Let me start by saying that I am 23 years old, 5'2 and weigh 100lbs. I am slightly underweight and really out of shape, I don't work out at all. I suffer from panic and anxiety and depression.
With that being said, I've been having this horrible pinching on the left side of my chest. It will be really bad for about 5 mins, w a pinch every like 30 seconds, then go off and come back in half hour or sooner or later. This started yesterday around 3pm then was off until later that night maybe 1am. That's when it got really bad so I went to sleep to avoid this horrible feeling. Today it's been off and on all day long. I'm really scared that this may be something life threatening. I've had an EKG, echo, holter for 24 hrs, chesst xray about 3 months ago when my anxiety was really bad and all was normal. I failed to complete the stress test however bc I started to panic and felt out of breathe. As far as other symptoms, I do feel a bit out of it sometimes when I get the pinching, this can be due to me panicking over it though.
Thoughts? Should I go back to the doctors?
My symptoms started like that. I would advice you to go to a cardiologist if it continues. Sharp short pains are usually benign according to the doctors, but Im in doubt if anxiety alone could make this happen. Dont procrasinate with your heart, youre doing the righ thing.
I used to get this pain about 2 years or so ago when i "tried" to exercise. I gave up on any chores bc my anxiety was so bad (went to ER twice bc i thought i couldnt breathe.) But yesterday I did a small chore and my arms where exhausted right away.
What is your diagnosis by the way?
I have ectopic beats(skipped beats), high BP, fast heart rate. No dangerous arytmia so far. Also had chest pain at one point(the serious kind) and trouble breathing.
I think you should get this checked out, since you cant excercise(which you should). For me it started with a series of sharp pains like yourself over the course of months.
My BP is normal, Heart rate normal, oxygen normal. (i can check this at home) And I did my checkups 3 months ago. I've had an EKG, echo, holter for 24 hrs, chesst xray about 3 months ago and all was normal. My doc told me not to worry. 
Could something have changed?
Ty for your help.
okay. Just pay attention to how it progresses.
Hi Emilia
if all the tests you have had have proved negative you could be low on magnesium. Women very often are. Magnesium is an amazing mineral that has many benefits. Might be worth you looking into it for yourself. It could be that you are feeling muscle spasms in your heart area which magnesium would correct.
I wish you well xx
Ty for your advice. 
I'm feeling slightly better atm after a pain killer and my anxiety meds.
Thank you Kathy,
I have magnesium supplement at home (this helps with anxiety too). Im in school atm when I get home I'll take it.
The pain seems to be mostly gone now. I do feel a stab like pain (which is different from that of the initial pinch) every so often during the day. It's usually if I sit in a awkward position or if I move my left arm in a bad way. Does this sound muscle related to you guys? I'm trying not to get anxious about it.
Hi emilia
Good news that you feel it's improving. I would keep taking the magnesium it seems to be helping on both counts. You could even have a pinched nerve in your back that is causing the pain you are feeling now which does radiate to your arm and chest. This is nothing to worry about though as it will ease off. Magnesium!
Enjoy your weekend.
Ty for your reply.
I suffer from severe anxiety and panic attacks and trying to keep myself calm for this but it's hard. Do you really think this is just a hurt muscle? Also I forgot to mention it gets a little more frequent at night.
Hi emilia
muscles can hurt at night which gives you disturbed sleep which isnt helpful to you.
I had a book recommended which you might be interested to look at.
Best of luck to you xx
Emis Moderator comment: I have removed the product name as we do not allow repeated posting of these in the forums. If users wish to exchange these details please use the Private Message service.
http://patient.uservoice.com/knowledgebase/articles/398331-private-messages
Thank you again. I seem to be ok when I'm resting in bed and sleep just fine, but prior to that if I stay up late is when the pain starts. Guess I'm overworking my body. The mods edited your reply, mind private messaging me that books name and/or a link?
Quick update. After the pain got worse and worse I had a coronary CTA and it came back all clear. The chest pain is almost dissapeared too.
Good luck to everyone. Get yourself checked up!
Hi Emilia! Well, I have similiar symptoms and I havent reached yet what is it with my hearth. What is your diagnosis for hearth?
Get yourself checked for Marfans it's a genetic muscle/bone. Disease that tall skinny people can have.It can also be life threatening if left untreated because a artery above the heart will eventually swell and pop because your heart is beating so hard from the way you muscles are and they give you medicine to make your heart beat slower and softer to prevent this
Hi, I see this post has been posted over a year...any prognosis. I stumbled on this site I too am having the same symptoms for overr a year got tested for stress test, ekg, and even where you have to drink a liquid and they inject you with something so your arteries glow in the scan. Everything came out normal. I get a pinching feeling off and on left side and sometimes the right side. I think it's anxiety or stress. Or panic attacks. Not sure how to even get diagnosed with that. Crowded places makes me feel uncomfortable feeling inside, my kids crying and fighting bothers me as opposed to just tuning it out like I use to. I. Not sure why all this is happening now at 40. If anyone else has these issues or know of a solution please let me know. Thanks.
Hello, Emilia. Firstly, I'd like to say you and I suffer from the same things. Your issue could be related to your anxiety and stress. Is it up and to the left of the left nipple? That's where my pinch was located. My cardiologist said it was merely anxiety-induced pain, couple with AI (anxiety-induced) gas. Just change your diet to things that will affect your chemicals in a more positive way, and try to make enjoyment a focal point of your life. Carry around music if you have to
Question for you. Does this seem to occur or worsen during pms or your menstrual cycle? I have the exact same issue and have been tracking for a year now and it happens the same days each month.