Possible pregnancy scare?

Rachael
So a week ago when I wasn't ovulating, I had protected sex with my boyfriend. My last period was 2-3 weeks ago. I watched him put the condom on both times and he did it the correct way I assume. Anyway according to the app eve, I was suppose to get my period today and I did not. which I know it can't always be spot on but should I be worried if my period doesn't come in the next few days? As in 2 days or so? I mean the condom at the end was still in great condition and putting it on we left room at the top, smoothed down the sides, when he finished we put on another condom and made sure it was just as good. I'm only getting so freaked out bc my mom doesn't know I have had sex and this is the second time he and I did so. But I told him tonight I wanna hold off from sex until I'm on the pill because I don't like feeling like this. Anyway my mom is calling about the pill tomorrow which solves that, but do you think that this could be a pregency scare? Should I take a test? How much do those typically cost?