After miscarriage

Had an early miscarriage the end of last month, my doctor told me to count it as a period which I did, so if I’m going off that AF is due in about three days and normally by now I would have had signs AF is coming and I have nothing.. ideas? Not really sure what’s going on. I mean this month we didn’t really try but didn’t prevent anything from happening either.. it’s also possible that my cycle will be off I’m just not sure.. ideas?!