D&C question and pregnancy test

Would this be just left over hcg in me its a very very faint line just curious I had my d&C 10/29/2019 I had sex 5 days later and yes I'm still bleeding and keep having sex I just want my periods back on track it's been almost 3 weeks since I had my D&C and my boobs hurt now and feeling sick just uugghhh I'm so lost about this its my second miscarriage and third d&c cause they couldn't get the baby out the first time