This might seem odd, but if there is a way I can send you stuff privately, I will send you a pic of what I have. With your rubbery lump you need a mammogram anyway be for you do ivf - frankly even without it! Do you know the hostest on E! News or is that just a US thing? Her name is hard to spell but I will guess Giuliana Rancic (I looked it up) she was about to do ivf in CO where I am and her clinic has a to-do check list before you can be approved and her mammogram she thought what? Why? I am only (around 30+ish maybe if I remember correctly) and she ended up being told she had cancer when she was alone since it was just to get the ivf check list done. Bottom line she is fine now after a couple surgies and treatments - that's worst case. I think she was stage 1a or 1b - either is very early and her baby born by surrogate she credits with saving her life since she had already done some of the ivf - egg stimulation and retrieval and she had a couple of frozen embryos. Had she not bad the mammogram and put more hormones in her body - her choice would of become discontinue pregnancy since that jump in hormones from being pregnant and after the injections would of made that cancer go from stage 1 to 3-4 very fast and could of left her to have a baby and leave the infant or maybe toddler or not have the baby and have the surgery and chemo right away - I would see that as an IMPOSSIBLE choice so I think you need to start thinking positively because breast tissue and fatty tissue are almost the same, under your arm they are the same since you don't make milk that far out and that is the largest percentage chance of what is happening. I would encourage you to us non hormonal birth control in this short time on the TINY chance that there is something else going on, but it's not something I would say is a must or something to see your doc asap about - just think about if you can do something like condoms until your mammogram. My bigger request is to call your doctor since your waiting on pre-approval and be sure the request is for a diagnostic mammogram not a preventative mammogram - for you it means just making sure it's extra breast tissue so diagnosing it as that. The wording sounds scarrier but it really isnt, it just gets you done quicker so you can take a deep breath and a sigh of relief sooner than later. Also when you call your doc, ask them to order it asap and call your insurance - it might be different there, but here a test ordered asap from a doc, as soon as it's approved it is done in 24 hours. Also don't let the ultrasound scare you- Dr. Net says when they see something on your mammogram you will be taken back for an ultrasound...but let's be frank - your boob will be smashed in 2 directions each and looked at closely, but how would your armpit lump be checked that way? It won't be physically able to be mammogram'd so they will look at it with ultrasound, since the can't really get it on the mammogram. Dr. Net though says it's a 22nd step to look at something that doesn't look correct, but it isn't always true - like everything else, it's true for some, but it isn't true for you and I.
Now next you said you are scared you have lymphoma, but what I was saying before about the rare cancer that is in your breast and causes a lump under your arm in your lymph nodes is EXACTLY what I was talking about! It makes your lymph nodes bigger, more towards the surface and very easy to find! You doc feeling all over even with her eyes shut picturing what she was feeling but couldn't diagnose or find anything dramatically REALLY DRAMATICALLY reduces that as a possibility! Congrats you have less than 1% chance of having that - of everyone only 200,000 women get it per year, so I would feel very very safe crossing that off Dr. Nets list of "maybe's" ok?
Lipoma is something if your going to ask Dr. Net for info on, it's a fatty growth and the other is "Accessory breast tissue "– "An uncommon condition in which additional breast tissue is found in the axillary (underarm) area. Women with this condition often require special mammographic examination." Twin this was an uncommon condition since many people had the test, we're told normal breast tissue and went no further, so they didn't have it removed or anything - and the scary sounding "special mammographic examination" is what I said earlier - armpits don't fit between the 2 smashing plates so they need looked at differently. These 2 conditions are the most likely. Maybe you can find a pic similar to yours and then feel better, but it may make you more scared since I find Dr. Net tends to go with worst case....
Please try to find comfort in the fact that even if you do have a cancer, most breast cancers, even the most spread cancer of stage 4 are not only treatable, they are curable and unlikely from everything I read you wrote + opposite of your family both sides (mom and dad's) did of a few different cancers so my risk is high especially due to my mom passing in 7 weeks from diagnosing stage 4 colon cancer and my dad having 100 large polyps that the doc said "they are of the size, type, and texture that 80% come back as cancer" - words I will never forget, but I will also never forget the follow up when all 100 polyps came back negative - but increased both of our risks for cancer later should we stop having colonoscopies witch can prevent it. Cancer is now and will probably always be a stomach dropping, heart skipping word, but now it is more curable, more findable (early), more treatable and cureable than it ever has been before. If you need to talk I can give you my number privately (only signed up on here for you so all I know about direct messages is that I have it checked, so you would need to start something like that). I have even had a grandpa with breast cancer but I was 3, treatment isn't what it is now 34 years ago so we lost him, but I am 99% positive based on what you have said that you are healthy and if you look up the 2 conditions I be live you have witch aren't cancer - please keep in mind when it says that growth can happen in your cycle (could be why it got a bit smaller, it will change through your cycle), and that it can grow when your pregnant - it means that if your on fertility drugs they can cause growth too! I am sure there is a large time difference, it's 11pm here and I am usually up late if you need anything, but my late could be your early!
I feel in my gut that my experience prepared me to share it with you and help you. You have only one "check mark" if you will in the - it might be a tumor (they come in both noncancerous - way more tumors are, it means lump or growth - but people's mind goes to cancer and they do come in cancerous, but it's way more rare than people think! In the it's fine side you have - your family history, your fertility treatment that causes things to grow (also please confine folic acid even now because if you get pregnant with it in your system then you lower the risk of things like down syndrome and some other issues like that so I take it and prenatal vitamins over the counter now even though I am not currently trying but you want to be as healthy as you can be when you get pregnant - regardless how), your 323rd thing on the side of it's not cancer or serious is your age, your health is 4, and you keep up with checking on things it seems to me (i don't know you, but from what you wrote, it seems that way) and that counts twice since an ounce of prevention is worth a pound of cure - so maybe instead of 2 points to a good outcome it should be 16 since there are 16 ounces in a pound...so by my count you have 6 or 20 points towards a great outcome..... Try to think of these things, ok?