Is this normal? Please help, I’m new at this

Erin

My last period was on the 10th, lasted 7 days. It’s my first period since going off BC on 12/15/21. My estimated Ovulation Day was 1/24, but my OPKs kept showing negative, so now the estimated day is the 28th. Now since yesterday the color of the test lines has creeping up, but very inconsistently? Is it possible I’ve missed my peak? Or is this normal?