it has been three years since my breast implant surgery.i had the under the muscle procedure.my left breast has always seemed to move around alot and i feel it.the doctor said that is just the pocket size it is in from the surgery.however on the side of my breast were my arm pit is the muscle seems like a hard knot and hurts...i have had mamograms that are ok and my obgyn says it is propably scar tissue from the stress of getting the implants under the muscle...what do you think?