Help 😒😅

I had a baby 10/29/18, I didn’t bleed much after he was born and I got my first period by 5/6 weeks PP (confirmed by my OB), it was heavier but normal length for me.

I had sex the day after ovulation and things got messed up with the condom we used, not sure if anything was leaked inside but now I’m 2 days late for when my period was predicted to come again.

How off was everyone else’s period after a child? I’ve never been irregular in my life before, and I was able to get a clear positive pregnancy test with my son 3 days before my period and I’ve already taken 2 with clear negatives.