Had sex today unprotected and he came inside me and then took the pill within 30 mins after should I be alright. I’m planning on going on birth control full time because I do have sex but if this pill I used now is good should I not ?

Edit: before I even took the pill I asked the pharmacist which pill is suited to me cause I obviously don’t want to get pregnant and I told him how old I am and what not and he gave me the postrelle-1 pill and said it’s safe and okay for me to consume the pil