What’s really going on?

So I am 8 weeks PP and DH and I had sex 2 weeks PP (Yeah I know what you are thinking but the damage is done) 🤷🏾‍♀️ we are totally fine with having a third baby btw they will all be close in age. Anyways I took a pregnancy test last Thursday and it was positive but I had my first postpartum period (at least I think) on April 20th and bleed for 3 days and it went back off well I bleed again yesterday and it stopped and I retested an hour ago and got another positive. Am I pregnant or is it left over HCG from the previous pregnancy?