hello, i am 24 yrs old. I been having sore breast for over three weeks now, at first i figured it would be my period coming soon since that always seems to happen a couple weeks before. But i still havent got my period. im getting kind of worried since it appears i can handle it while i have a bra put on, but every time i take it off i even have to hold them. I have always been big sz but only had that problem before each period. i am also single i definetly know im not pregnant. do u have any idea of why it could be happenning?