If doctor says OK, you should be fine, it'd be safer if you don't have family history of breast cancer.
Some passibility could cause breast pain:
pregnancy (hope not,don't think so);
Breast feeding (don't think so);
breast abscess (don't think so);
Onset of menopause (don't think so);
Breast fibrroadenoma;
Trauma (you hu*****and might cause that);
Estrogen replacement therapy (don't think so);;
Shingles (if rash doesn't develop soon);
Beast implant (this is real, right);
Breast cancer (this seems have been ruled out by your DOC)
YOu will be fine if the pain gone soon!