Teen pregnancy help!

Hey whom ever has the unfortunate event of reading this.

My ex partner and I were kinda having make up sex (not getting back together but complicated whatever it was)

Any ways in the heat of the moment we forgot the condom. I am on the pill but I'm on the sugar pills since my period was due the next dayand I'm meant to be 4 days into my 16 day period.

When do I check since I was meant to have my period the next day? I'm just hoping it's pretty late. But I'm kinda nervous. Please help

Kind regards