You could have a peptic ulcer, or gall bladder issues, unrelated to the pouch. It doesn’t sound heart-related, but if you have any doubt about that it should be ruled out. If it’s one-sided it could be a kidney stone. A bit of blood in the stool might be unrelated, though the timing is suspicious - have you been straining on the toilet? Do you have any hemorrhoid symptoms? Have you made an urgent appointment to see your doctor?

Thanks, Scott. No straining really, also don't sense any hemorrhoid symptoms. I was thinking about making an ASAP appointment but wasn't sure. Sounds like that may be the best best to play it safe.