Confused and concerned

Hi

This my first time writing in the app. So I’m supposed to get my period in 2 days… on the 22nd. I had unprotected sex today (I know so dumb of me), and my FWB did not pull out 😠. How likely is that I can get pregnant? Even if the chances are minimal, does it mean I will still get my period? I know I can take the morning after pill, but i also don’t want to mess up my cycle. Meaning if my period comes in two days, can that be an indication of not being pregnant?. I’m just confused on what to do. As my period is finally back on track, after a few months of craziness. Thanks 🙏🏽