Tyson, Severe abdominal pain while on Pred IS an emergency. DO NOT WAIT!!!!
You could have a bleed. Please go now. In fact, dial 911. EMT's are as equipped to help you before you get to the ER.
I don't know what more I can say but go in NOW.
Normal is not severe abdominal pain. Normal is no pain.
Seriously, do you really think you can wait? No, deep down I doubt you think that. If you trust nothing else, please trust my experience with emergencies.
I hope you can get some help.
Annie
There are other reasons like kidney stones, gas, diverticulosis/itis, etc. but any severe abdominal pain is cause for going to the ER.