Could I be pregnant?

I started my new pack of birth control pills on December 3rd and I had unprotected sex Tuesday, Wednesday, & Friday. My period didn’t start on today. My period is normally on time and it’s never late. Today I could say I didn’t get my period! 🤦🏾‍♀️ What should I do? I’m only 21 years old including my partner. We are both in college!