Still bleeding at 4 Weeks?

Ha

I started this miscarriage (was 7 weeks along) on March 16, passed the sac on March 18, and the bleeding seemed to get lighter from there. My HCG was 4,000 and was slow to go down the first few weeks but the past 2 weeks it has dropped significantly. Last Friday I was at 374.

Now this week I started bleeding again, mostly dark brown bleeding and some thin tissue looking material, but sometimes bright red too. I’m also cramping again. Is this normal?