Am I okay orrrrr plan B?

I have no one to talk with about this situation... but here it is.. I just got off of my period (April 10th-16th) yesterday and I had unprotected sex yesterday in a hot tub (I know it doesn’t change anything), however he didn’t ejaculate in me at all... I went home then opened a brand new pack of birth control (took it an hour after I had sex).

Now that I started my very first pack, I plan on continuing the use of the birth control I got from my health department back in January...

Please comment, it would really calm me down a lot... I absolutely understand it was the dumbest decision I’ve made so far..