Could I Be Pregnant? 😥

so i lost my virginity to this dude last thursday i think? and we had three rounds and then had sex again that saturday. he wore a condom and pulled out before he came but because i don’t have much knowledge on this i’m worried. i know we were very careful but i’m still so anxious. i’m one day late on my period as of right now (oct. 16. 2019) but i’m normally 5-7 days late on my period as it is. can some of you let me know what you think? (as terms of if you think i could even possibly be pregnant)