Help!!

Hello everyone, i have a question, I went to go pee and wiped and saw light blood. I have pain the upper part of my stomach (not had pain).

I went to the hospital a couple days ago and they checked my HCG and it was <10. Today is the last day of my fertile window my app says. Last month I started my period a couple weeks early.

All my blood work came back great! So I’m kinda confused and a little scared. Has anyone else had this issue?