I am usually a 34C and have been since I was 14. I am now 18 and Just recently (last month) my breasts grew to a 34D, now my new bras I just bought are too small in the cup, tried a 34DD and it fits. I have my period every month, but they just keep growing.. is that normal? No weight gain, it is as if the more weight I lose the bigger my breasts grow. I'm 5'4" and have weight a decent 175lbs. For about 3 years now and my breasts never changed size until about a month ago. I've taken pregnancy tests and I'm not pregnant. Is there something wrong with me? I've never seen a gynecologist, so I can not go see one. I'm just a little nervous about it..