So confused!

Abi • 22- Mommy to baby Hugo 06.03.19👶🏻💙

So I was getting very very faint lines last week then started heavy bleeding on Saturday and lasted for 4 days like a period type bleed. Then took a opk yesterday after I stopped bleeding and have been getting just shy of positives the last 2 days which is weird because only just stopped bleeding. I took a HCG this morning and got a faint line still! Have no idea what’s going on. I’m no longer bleeding but still getting faint lines……

What could this be?