Period after miscarriage

I have natural miscarriage on 10 week on 7/5. The blodod stop on 14/5. And soctor advise me to eat folic acid for 3 month. Period came back on 9/6 and it was brown at first slowly on 20/6 it become normal heavy bleeding with small clot. Till now it is still heavy and not over yet. Is it nomal?