Weaned 3 weeks ago and TTC#2

Hello everyone! I love this Glow Community! I have a question and wondering if anyone can relate!

I got my period back in May, when my son was 15 months old! They were back to regular, 28 days! I weaned my son on July 18th (I’m a math person and remember numbers haha) when he was 17 months. According to Glow that was during my fertile window! I’m currently 4 days late and got a negative test this morning but I am NEVER late! The last time I was late was June 2017 when we found out about my son 😂.

I know weaning messes with your hormones and I’ve been in rare form lately so I know it’s true lol

My question is: Can weaning delay ovulation or cause a change in your periods?! I should also mention I always have pain when I ovulate so I know when I do! Last month I didn’t feel anything or it wasn’t strong enough to notice really!

Thanks in advance!