Even after 25 years, once in a while I get some sharp random pain and I immediately think, "Oh heck, what did I eat that could cause that?" Sometimes it is the same thing I had before... doesn't matter though. It's just how the body digests it that matters. Push liquids and it may resolve itself. Also be sure that your appliance has been changed recently. The adhesive side of the wafer can wear away and sometimes the hard plastic layer can be really uncomfortable around the very edge of the stoma. Eakin Seals helps to reduce this wear tremendously.
Best of Luck to you and if you have more questions, just ask away. We will try to help you through all this.
Diagnosed with CD in 1979, many resections and meds
Perm Ileostomy July 1984 at Cleveland Clinic
Disease free since surgery