for 3 weeks, i have had pain above my navel which radiates left and right, terrible nausea with retching and sometimes vomiting, and very loose and watery stools. i have had a headache just to the left of my forehead, and during the nausea/retching/diarrhea episodes, my skin becomes very clammy and i feel hot and like i'm going to pass out. the pain reaches a climax and slowly subsides. then i feel very tired. today i feel a lot better. what could be causing this? i have seen my doctor, who didnt know what the problem was, so I was given lansoprazole and domperidone for the nausea and i had a blood and stool test done. I should get the results in a week but i would like to know of any possible causes.