Advice?

My period is irregular. I haven't been stressed or anything. The last time I tracked my period it was 37 day between cycles. If that makes sense. This time its 54. I can't remember which day it was but about two weeks ago when I wiped it was like a light pink. So I thought my period was coming. Should I just wait until the end of this month to take a test? I keep having cramps like its going to come. I just want to be pregnant so badly and previous times its been late I take a test and its always negative. I guess I'm just nervous to be dissapointed.