What’s the earliest you got a BFP?

I got a positive today (I’ll post pic in the comments), and I am potentially only 7 dpo after doing the math. This could also be ENTIRELY wrong, and I just didnt log when I had sex every time/ or didn’t ovulate when I think I did. I have PCOS so things like this are super hairy and unpredictable unfortunately. I had a chemical miscarriage already last cycle. Hoping this isn’t another one.

I am really skeptical and wanting to know what others experiences were.