I don't want to scare you, and I know my experience is not the norm, but I still want to share it with you. After I had my daughter, I had a period for a long time...went to a 12 weeks checkup, still on my period. He tried the IUD, didn't work, tried several different types of BC, didnt work, did a D&C and put another IUD in, didn't work. Finally, he did a uterine ablation and a tubaligation in hopes it would stop my period. Didn't work. It's been almost 21 months and I'm still on my period. Somedays I spot, somedays I flow really heavy. I never know which day it's going to be. I have my hormone levels and bloodcount checked every 4 months and he cannot figure out the issue. My hormones are out of whack a little bit, but I'm not anemic. So, on the 18th, I am going to have a partial hysterectomy.
With your follow up, specially if you are bleeding that heavily, have him check your blood levels. Bleeding alot can cause a lot of harm and it's scary.