Other than pain and possible fever, what would be the symptoms of appendicitis be for a person with a SCI?

I was having a sharp pain in my lower right abdomen last night/early morning and it has returned this evening. I thought it might be gas so I did my trick to get rid of it, but it wasn't gas.

If not appendicitis or gas, I'm thinking possible kidney stone passing through the ureter maybe? Or possible phantom pain?