Hello, I have very irregular periods, sometimes I will go 2 months with out one. I am on no form of birth control, I am pretty healthy, I am known to stress often. Anyways, I am trying to conceive w/ my long term boyfriend. We had intercourse while I was ovulating in June it is now July 31st I ve taken 3 pregnancy tests all negative & still no period. Now my breasts are super heavy, super veiny which is not normal, and my nipples are more than sensitive. What s going on?