No AF but slight pain

So according to to glow AF is due today... Not saying she won't come but lastnight I was cramping as if my uterus was preparing. Which is unusual because I normally cramp a few days before til the day it comes on not the night before. Like just one night. Ummm.... Anyway I took Tylenol to relieve the pain. The whole night I was uncomfortable by the pressure/pain. Woke up still no AF. I don't have to poop or have gas ... But idk what it could be. Help please! I really don't want to go to the doctors because my doctor is a bitch. & I don't want to go to the ER because I'll have my 1 yr old &I have my final exam for phlebotomy technician today & I'll probably be in the ER all day long. Ugh idk idk.