Mamas when did your cycle became regular after birth?

Non-breast-feeding moms when did your cycle after birth became normal again? I am 3 months postpartum!! I’m not sure if this calendar is correct but by looking at it I would have ovulated on Sunday. Please no rude comments hubby and I made a dumb mistake and that was having sex the day before ovulation and then again today.

My first period was September 9 through the 15th

My second period was October 6th through the 9th

My third period was October 29th through November 1st

So I don’t know if these sounds like normal 28 day cycles

What do you ladies think?