Hi, I've been on the pill for about 6 months now, and my fiancee and I have been having unprotected sex for about 2 weeks now. I've recently started having intense cramps, and I generally feel like I'm about to throw up. This isn't a constant feeling, though, it comes and goes throughout the day. Barring pregnancy, what could make me feel like this? Just to let you know, I go from laughing with friends to having to lay down on the floor and cry in the space of maybe 5 minutes. Also, I have this oddly colored brownish discharge that isn;t blood. My periods are never regular, even on the pill, but never a week ahead of schedule.