Should I take a test

Im on birth control but I know it's not a hundred percent accurate and Bc im alleheric to condoms I can't use them so my boy pulls out again I know that's not safe well I been feeling really weird lately n I have cramps like bad period cramps but my period doesn't come for another 15 days n I'm too anxious to wait but not sure if I'm just over thinking and should wait but anyways like my dreams usually come true which is weird but I had just had one about be being pregnant i really hope not but like I never over thought about this before but now it hasn't left my mind what should i do