Advice!

Okay, so I'm a little concerned because this is the first time this has ever happened... I'm 22 and 2 weeks ago I had unprotected sex.. the guy didn't ejaculated inside of me, but he got a little worried, so I broke down and took the plan B on the 3rd day, hours shy of 72 hours

.. I'm supposed to start my period in 3 days, and I guess I'm a little paranoid! should I be clear from pregnancy 😭