Has anyone gotten pregnant outside of their ovulation window?

I’m not currently testing for ovulation but going off the apps prediction. I was predicted to ovulate on the 13th, had sex on the 20th (a week past predicted ovulation day), and my period was expected the 27th, and now it’s December 1st and no period! I took a test and it’s negative but not sure why I would be late..

Anyone have sex outside of their window and end up pregnant??