Cycle after miscarriage

I had a miscarriage last month at roughly 6/8 weeks. I bled really heavy for 11 days spotted for 3. I've now gone 23 days and started spotting again, it's now my 7th day spotting.

I was told my first period after would be heavy and painful. Just wondering if you anyone else had the same or if I should consider going the doctors to get it checked out?

Thank you