So I recently discovered one of my breasts is larger than the other.. I didn't think anything of it until about a month ago, while adjusting myself (the girls kept moving around) that I felt a hard lump. I immediately froze. As soon as I got home I looked up how to do a self breast exam. Things seemed off. My right breast (the enlarged one) feels tender sometimes.. and a strange achy feeling travels up to my under arm. I'm due for a mammogram next week but I've been thinking about it over and over and I just need some reassurance that it could be nothing. Any one have something similar happen?