I don't understand....

I'm still bleeding but no cramping. Just pray this isn't a miscarriage. But I don't understand why I'm bleeding... When I was pregnant with my first child back in 2009 I had bleeding and went to the hospital as wel my hormone levels where low and a ultrasound was done and there was no baby in my uterus. 2 weeks later I went back to the doctor to find out my levels where high and there was a baby. He is now 6 years old. Just praying so hard right now!!!