BFP after periods for 2 days

Deb • Mom of DS (March 2020). Mom of DD (August 2024)

I got Vvvfl on 11 dpo. A little darker but still faint line on 12 dpo. On the same day I started bleeding, definitely not spotting, what i thought was my periods 2 days early. I was absolutely heart broken, went to dee the doc, got blood test done... beta hcg showed 0.305 (negative for pregnancy). However, In 2 days (precisely 48 hrs) my bleeding, which was much much lighter than my periods, ended today. I just did another test and i got a little more prominent second line, attached, which i think is still faint??? What do you ladies make out of it? I am worried to death of this situation. I have heard blood picks up hcg faster... why was my blood report negative?