Dont know what it is

Tamika • Hi I am a single mom of 3 kids, I have 2 boys and a girl.
I had af visit me this month on the 3rd to the 5th. But today when i walk around at my job i start getting bad cramps in my stomach and pelvic area have no clue what this can be from i was fine at 6am this morning now its 10am but started cramping bad at 9am. I hate going to the er cause they want you to wait 5 hrs before being seen.