Last night while lying in bed I found a lump under my breast. It's hard and painless but about the size of my thumb. It's under my right breast and just about where my breast meets my chest. After I found it I decided to have a look in the mirror to see if I could see anything but I found that when I stood up it seemed to disappear. I can only find it while lying on my back.
I am trying to decide about whether to go to my GP or not. I don't really like him and would rather not go if this is something minor. Is it normal for breast lumps only to be able to be felt while lying down? Is it possible it's something minor? Does it matter that I can't find it while I'm standing up?
I'm 37 and female. I'm generally in good health although I do have PCOS.
Any advice would be much appreciated.