Ovulation question

So I’m currently 22 weeks 6 days. Out of curiosity I wanted to find out when I ovulated. I went to google and just searched when I ovulated that took me to many different websites that showed highest possibilities of when I ovulated, I went off of my due date to track back as that was an option because my periods are so irregular I couldn’t tell you when I have them.

I was curious because my first pregnancy I wasn’t able to get a vvvfl positive pregnancy test until I was about 5 weeks pregnant. This pregnancy according to my ovulation date I received a VERY clear positive test at 13 dpo. Does that seem right to anyone? Or did I possibly ovulate earlier then what I’m finding, sorry if this is a stupid question I’m just generally curious