Hi. It's been about 2 months that I have severe pain in my left brest.on the sides near the armpit. the pain was there at the beginning but it started to move to the middle of my rib and right side. and recently to my back on top. Had the mammography and it was normal. Had chest X ray and doctor said it is costochondritis. but why do I have severe pain in my breast's muscles on the side. I can not touch it or even wear a bra.What can it be? How long should I wait to be fully recovered?