Any Idea?

I had an miscarriage in the middle of September I bled for 12 days and I waited 2 weeks til after the bleeding stop to have sex and Thursday was the first day it didn’t hurt at all it actually felt great but 4 days later which is today I had intercourse and it hurt soooo bad to the point I cried in EVERY POSITION felt like my insides was getting stab over and over ! I have no discharge nor no type of smell so that’s good and no type of irritation down there other then Im completely sore from the pain .. do anyone have any idea what it could be ?