1wk ago i noticed pain in my breasts. sometimes sharp, or constant, dull. now its only in my right. feels heavy, sometimes warm, etc. normal? i'm 19.

Possibly: If the pain developed one week prior to your menstrual cycle this is fairly normal and related to hormone effect on breast tissue. It tends to improve several days into the menstrual cycle. One breast may be more affected than the other due to normal differences in breast tissue. If you have isolated pain at a different time with warmth or redness need to rule out abscess. See your provider.