AF after miscarriage

I had a miscarriage 4 weeks ago and I started AF 5 days ago my usual period is only 3 or 4 days long with only heavy bleeding the first 2 days well I know this one would probly be different but it's been 5 days I thought yesterday it was slacking off and so last night I didn't wear a tampon because I usually don't need it and I woke up at 430 fell icky down there and sure enough it was heavy with clots again (sorry TMI) I don't know if I should be concerned or what any advice??