How long does it take?

🙈🙉🙊 • Mom to 2 amazing little boys.
I started bleeding yesterday, doctor confirmed there was no longer anything on the ultrasound. My hcg had dropped from the week before. This morning I had major contraction like cramping for about an hour. Passed a lot of sizable clots and now it's tapered off. How many days of this will there be? I was 6 weeks 3 days yesterday.