Ovulation bleeding?

It has been three years since the child started menstruating.

It seems like there are occasional irregular bleeding. Looking at the dates roughly, I noticed some staining on my underwear around ovulation.

I went to the obstetrics and gynecology clinic, and they said it takes about three years for the menstrual cycle to stabilize, so let's just observe. They also said there was no problem on the abdominal ultrasound. Could it be ovulation bleeding?

Is there anyone who really experiences ovulation bleeding?

I'm curious.