Is there any chance of a BFP?

Mimsy • Married 06.25.16 💕 TTC #1 since July ‘17 💕

My BBT went down slightly again today but no signs of AF yet for tomorrow, and I’m too scared to test early because it’s always disappointing. Has anyone gotten a BFP with zig-zag lines like mine on their BBT chart? (And I know I skipped a temp log 2 days ago, but I didn’t really sleep well and only got 2 hours maybe so I didn’t bother taking my temp).

Please tell me your thoughts!!