 [ Symptoms ] my left breast has always been bigger than my right breast but now it seems that it has grown a little more i am 66 years old and i had a mammogram recently but i also noticed that my left breast has grown slightly more over the last year or so could this be a problem [ Disease ] hi sorry for not getting back to but this never got to me just found it for me i would say go get tested either and hpt or at you doctors look you have not said but are you or at the time you had unprotected sex was you on any kind of meds these can lower the effect of bc hope this helps you good luck