My last period started on Jan 6. and it is now March 5. My periods aren't always regular, but they aren't usually this late. My nipples were VERY sensitive for a few days last week. I have got cramps occassionally for maybe 5 minutes a day. Tonight i got SEVERE cramps, to the point that I almost cried, but only the slightest bit of light red blood, not even enough to show up anywhere. And every night I wake up soaked, from night sweats. And i took a test last week, and it came back negative. Am I pregnant ? Whats wrong with me ?