My BBT dropped, does that mean AF?

Dani • 38yrs old 15'💍16'👰🏻💕🤵🏻 19’💙👶🏻 20’💗👶🏻

So, my BBT yesterday was at 98.26 and today at 97.92. AF is due to arrive on Saturday (2 days from now). Based on my chart, do I still have hope or too early to tell? I was told I ovulated on CD 19 which would put me at 11 DPO. Right? I also took a HPT (since I got anxious) and got a BFN this morning. Kind of feeling a little blue to be honest.