My September period was 1 week late coming October 4 it was normal. October 31 I got my period again it lasted 1 day. Novber 28 was the next lasting 2 days. I've been having unprotected sex with my boyfriend since October 20 pretty much every weekend. I have taken several urine pregnany tests that have all been negative. This past week I've been having cramping been very emotional and a lot of nausea. My next period is due December 26. Am I pregnant? Help!