Is it positive? I don’t know my dpo

Be

Hi, I didn’t mark on the calendar my last period, so I am very unsure about my ovulation window.

I tried testing for ovulation, but only got negative during the days I thought I was going to ovulate.

I think*** I am 10DPO, but don’t know for sure.

This showed in less than 5min, but I am not sure if I am seeing things.

TIA