Hi, I am 27 and have been experiencing very tender breasts for the last week. Also yesterday I started having a dull, cramp like pain in what feels like the right side of my pelvis. It's more noticeable during intercourse and also when I go to the toilet. I haven't had a period in about 18 months as am taking the mini pill (Norgestron). I took a pregnancy test a few days ago and it was negative but all the symptoms seem to suggest it could be pregnancy. What do you think it is?