First time

okay guys I really need some advice, I've had my first time sex yesterday and the only contraceptive we had was a condom (he's not my bf (more f+)) and it was kinda dark in his room so I couldn't even see if the condom was broken after we were done. idk I'm extremely scared of getting pregnant (I'm 17) and now I'm thinking whether I should get the emergency pill (the one u take afterwards) or not?