Uhm, Late Period.

Hey girls, so it's been approximately one month and 14 days since I've had my last period. My periods are usually irregular so a skipped week is not unsual to me, but this is entirely new to me. It's been as said, 2 full weeks since my last period. I got my last one in Feburary, the fifteeth. I'm not too sure what to think, my boyfriend says I should take a pregnancy test for obvious reasons. I believe I should wait a couple days or so because two days ago, I felt period-like stomach pains which usually is followed by my period, but now I'm worried. Any advice?