Help! Could I be Pregnant?

My boyfriend and I have been dating for about 5 months now. We’ve only had sex twice; once was a little over a month ago and another time 3 weeks ago. We have used a condom both times. The first time, he pulled out way before he even finished and the second time he pulled out immediately beforehand. However, I’m still scared that there’s a chance I could be pregnant. I took two at home tests four days before my period was due and they were negative. Now, I’m just waiting for my period. It was due two days ago according to the app but my periods are pretty irregular. I can’t help but feel nervous if it comes later than what the app says, even though it normally does. I have also been having light cramps for the past few days and my stomach doesn’t feel normal. That’s never happened while not on my period before so that’s another reason why I’m scared. I haven’t been feeling any other symptoms. Should I take another test at the end of the week or should I wait it out another week? Help!