hi
It might not be anything to do with it but for me I had left side pain prior to my first crohn's flare up, I'd kind of already worked out, through trial and error, that it was probably caused by alcohol. Not that I was drinking much. even acouple of pints was enough to set things off.
Anyway my GI said that not many people with Crohn's can tolerate Alcohol.
This pain was persistant and went on for weeks and weeks but since I've not been drinking, no pain.
Just a thought
Good luck!