I have been on my period for 11 days. It started 2 weeks later than my normal cycle. No abnormally heavy bleeding, some small clots, but that is normal for me. For the past few days the bleeding has been very light, I can wear a pantyliner or light tampon and it doesn't soak through. But it doesn't show any signs of stopping so far. I had cramps in the beginning but they let up about the 3rd day, that is also normal for me. Usually my periods are regular and last 5 days, never more than 7. I am 26 years old, and have never been on birth control. I don't have cramps, fatigue, fever, nausea, pain, or any other problems. What could be wrong?