i might be psyching myself out!!

whenever i have sex with my boyfriend i am very strict about him wearing a condom and pulling out bc i tend to get extremely paranoid abt pregnancy since im not on the pill and im only 20. today he was inside me for a few seconds (thrusting lol) without a condom  in the beginning of our hookup, and then he put on a condom and we followed our regular routine. there is no way i could get pregnant from that right? my period is supposed to be in 3-4 days and im so afraid 😖 i know this probably seems ludicrous but im an incredibly anxious person and i always think of the worst! thank you for reading my mess of a post omg !!