I'd get it checked out too. Food shouldn't make your pain worse. My post-surgery pain is just kind of a dull ache, and hurts mainly after I've been laying on my side. It hasn't been bad enough for pain pills since the first week of the surgery.
I did have a scare one night. My insides were awful quiet, and I was having pains every now and then like the start of a blockage. I think my intestines just decided to shut down for awhile (this has happened to me before). Thank goodness it only lasted a few hours, but my parents were getting ready to take me to the ER.
34 years old, Crohn's disease for 15 of them
Resection of ileocecal valve on 09/22/09
Current Meds: Humira since 7/08, Pentasa, Effexor XR, Zyrtec
Supplements: 3 kinds of Fish Oil, Multi-Vitamin, B-Complex, Vitamins D, E, & K, Calcium, Magnesium, Enzymes
SCD since 12/01/08 - eating Stage 3 foods