So confused

Amanda 🏴󠁧󠁢󠁥󠁮󠁧󠁿 baby #4 due Summer 2020

Af is 3 days late, I am never late..... at 12 dpo I had literally a couple of spots of bright red blood and then 3 days of browny/pinky discharge and now nothing. I took a test at 14 dpo and it was negative. Today, according to Glow, I’m 15 dpo... has anyone had bfn up until this point and then got their bfp at 16/17dpo?