I am a 22 year old male. I was diagnosed with duodenal ulcers 3 months ago and have been on Nexium. I have been told the ulcers are now healed but I have been having SEVERE pain in my lower central abdomen, the navel and another spot about 2 inches down. It comes and goes in severity but is pretty much a constant source of pain. The pain is a stabbing sensation that gets worse after I eat and when in certain positions such as laying down. I have been to two internal medicine doctors who have not found anything. I have also been to a GI who did blood tests, an upper endoscopy, colonoscopy, capsule endoscopy, CT scan, abdominal xrays, and ultrasound all have come back negative.