Digestive disorders

Patient: Im a 27 year old man and i got a problem with my upper stomach just below the chest , it hurts and itches after eating anything ,even when i drink water. i have had an endoscopy twice and nothing was found , i have done so many blood tests and also an h pliori test and they all came negative . i have taken every type of digestion related medication and nothing seems to be working (omeprazole, lansoprazole, ranitidine) .My condition worsens when im sitting down , i feel confused and tired all the time and i have been suffering from this condition for more than 5years nowi dont get any dhiarhea but my stomach make some very strange noises , i have even tried to change my diet but this doesnt work either