On March 11 my period started and was normal as usual and ended about the 13th. On this past Friday, mid-afternoon I developed a low grade fever (100 degrees) and had the worst stomach/lower abdomen cramping I have ever experienced. It lasted the remainder of the night- I mostly slept- and I had chills until my fever broke at about 11 pm. Saturday I was feeling better but was pretty fatigued and my stomach was still worn out. This morning was the same story- only last night right before going to bed, my period started again. Today it hasn't stopped. It doesn't seem to be normal in the sense that it seems to be old blood (dark red), brown, and not near as heavy, but I can't understand what's going on. I have a boyfriend and we have sex regularly, but I started Yasmin early February. Any ideas on what is going on?