Excessive bleeding

Holly

I was pregnant for 9 weeks and had a miscarriage in late october/early november. In december i had a seemingly regular period. In january, i had a normal to light period exactly 28 days from my december period. I am not supposed to start till 2/13 but i started bleeding on 2/5 and now its extremely excessive, with a couple nickle sized clots and a lot of smaller ones. I cannot subside this bleeding and now i have some cramping going on. Im freakin out. Please tell me if this is normal after a miscarriage or if i need to call my doctor or something.