Ovulation help! ♥️

So I got off the pill in Aug. & bleed end of the month.

First real pd came Sept. 22, followed by:

Oct. 25

Nov. 23 found out I was pregnant but then got my pd the 28th. (Chemical pregnancy)

Dec. 28 pd started and lasted until January 4th.

Glow says I ovulate the 15th, just took an opk (January 13th) and it was blazing positive.

I’m starting to think my pd is irregular and idk how to figure out when I ovulate. 😭 I feel like sometimes early, sometimes late. Any help or advice? ♥️