Big drop @ 8DPO ... still a chance of BFP?

I think my cover line is wrong and I ovulated on CD12... (glow still getting to know me as normally use Natural Cycles which thinks I’m now 8DPO).

Had EWCM on CD9-12.

Big temp drop today and some very light spotting... still a chance of BFP or do you reckon AF is coming? 🤷‍♀️

Usually get AF on CD25. Thanks in advance 😊