Dip in BBT, 3 days late

Va

Has anyone had a major drop in bbt 3 days late but still end up with a BFP?? I’m 17dpo today :(

Yes, I know my chart isn’t complete (I didn’t want to stress about temping this cycle) and I know my times are off. But in general, has anyone had a temp drop & still end up with a BFP??