my husband has stage 4 bladder cancer and had his bladder removed 2 months ago. since he has had constant nausea, without vomiting, diarhea, but not everyday, and has lost 45 pounds. he has had an upper gi, colonoscopy, CT scan, and ultra sound of his abdomen with no diagnosis. nausea meds are mostly ineffective. he is miserable and we are at wits end. tomorrow we are doing a stool analysis for bacteria and parasites. he has already been tested for c-diff. negative. please help. any other ideas?