I was 2 weeks late for my period, took a test and it was negative. Then I started bleeding when I was almost 3 weeks late. It was not normal for me at all, I felt very sick. I took a HPT that night, came up positive, faint but positive. Then that next morning the bleeding had lightened and I took another test, also positive. The bleeding only last 2 days, which is not normal period for me. 2 days after i got the positive test and stopped bleeding, I took another test. This time negative. The next say I got sick and vomited. So, I took another test, still negative. Has this happened to anyone before? What is going on?