Urinating CONSTANTLY.

Yes, Hi.. So it just started like Tuesday.. I am waiting for my period that was supposed to start today... Which it being late seems to be normal cause it is every month... But these last couple days. I've had really bad cramps, constantly peeing after every drink I take.. I can't do #2 without supplements... My stomach has been hurting and its crazy! Any ideas? I don't want to take a test because the late thing.