Miscarriage again??

AF is two days late, I had a faint positive 2 days ago. I wanted to test again today to make sure it's real. I went and bought the same brand test and took the test after a 4hour hold but it was completely negative 😩

This is so frustrating, I just had a miscarriage in April.

Anyone had this happen and got a bfp later again?

I obviously drank water and coffee while I was holding my pee. And I drink quite a bit, so my pee never gets yellow. Now I'm wondering if that's just why. But my HCG should have doubled in 48 hours, right? So shouldn't I at least get a faint line? 😩😩😩😩