Hi I Started Using Trigestrel A Day After My Last

hi
I started using trigestrel a day after my last period as told...

I had unprotected sex on the 2nd of dec like an idiot

Then on the 4th of dec i was in a car accident... The doc gave me antibiotics to take for 15 day

I had sex only once during the course l. I didnt have any sex after that while on the antibiotics
I read that i can start 2-4 days after taking last yellow pill

Panicking please help