ive definitely been down that road with doctors.......took Antibiotics too. they couldnt tell me what was wrong after numerous visits and blood tests. has your husband seen stuff in his stools that look like parasites? i dont know what type of medical plan you are on but i would ask to see a specialist....naturopath or try to find an ayurvedic in your area. from your post it sounds like it could be crohns disease. have you tried any herbal treatments?