When to expect period?

Hey i had a mc that ended about 3 and bit weeks ago I was wondering how soon would I get a period? It was only 4 weeks so an early loss and bleeding only lasted about 8/9 days and was like a normal period. eve says it’s due today but I just tracked the mc as a period to make it easier. I have been having sex between then and now is it even possible to get pregnant within those 3 weeks and my before next period?