Can a women get pregnant if she’s not ovulating?

Yesenia

I feel stupid. If a women only has a certain window to get pregnant (when she is ovulating) why use the Plan B (the next say pill) If her ovulating days are not near. I had sex yesterday and today my last period was a few weeks ago so the next one should be next week. I didn’t use any type of protection and he did finish inside of me every single time. So now what?