I had a miscarriage on March 17th, I bled for 2 weeks and then stopped but I still have hCG levels.…

I had a miscarriage on March 17th, I bled for 2 weeks and then stopped but I still have hCG levels. It's been 8 weeks now and my hCG level is almost gone BUT on Monday I had cramping and then heavy bleeding, passing a big clot. The day after and yesterday I wore a pad and no blood. Then today at 5:10pm, I had cramping and heavy bleeding, no clots. Just bright red blood. Is this normal or should I call my OB?