Pregnant after a miscarriage

Cris

So I had a miscarriage February 7th at 5weeks my hcg levels from 1275 drastically dropped in 3 days to 750 so I was bleeding for 2 weeks exactly but after that I just wanted to have sex with my husband like everyday I still haven’t gotten my period took a pregnancy test today and it came back positive…. I’m not trying to get my hopes up but has this happened to anyone and was actually pregnant again???