Sorry if this has been asked before, but I'm on some pain meds and was having trouble searching up an answer

I was wondering, for those who've gotten a BFP, what the latest date of their BFN was before?

I got a BFP last cycle (chemical pregnancy) at 12 DPO, and now I am at 13 DPO with a BFN this morning.. but am curious if I am out of the game for this month, or if there is still a chance for that positive test??