i’m scared lol

so i just recently started having sex. about two weeks ago was my first time and we used a condom. one week ago we did it again. of course with a condom. this week i was supposed to get my period but it hasn’t came. sometimes my period is irregular so i feel like i’m just being paranoid. but now that i’ve had sex i can’t help put panic. am i overreacting? i’m almost 17 by the way, if that’s important