First time! Help❗️

I had sex with my friend for the first time yesterday. We used condoms and as much as i remember he did finish outside, but the problem is i was late on my period (was supposed to start on 14th now its 21st) and i had a light bleeding but i think that was just because i was a virgin. Im very afraid of getting pregnant since im only 17 and he was a friend not even a boyfriend. Help! Can anyone explain if im safe or not?