I had medical abortion of a 4 week pregnancy on 22nd March, 2024 under the supervision of a clinic. I had bleeding within 2 hours after the administration of the pills and it continued for 5 days. As per instruction of the doctor I had an usg after 20 days of abortion which said "no retained products of conception", I had a normal market pregnancy test as well which came out to be negative. But it's more than 30 days and I have still not got my period. What can be the problem?