i am 26 yr old female. not pregnant. For the past 2 weeks i have been vomiting after meals. it usually happens 1/2 hour to 3 hours after eating. i have no pain or nausea otherwise. only nausea right before i vomit. my doctor has done blood work, HIDA scan on my gall bladder, and an endoscopy- he did a biopsy to test for Hpylori. the only thing that was found was a hiatial hurniea and inflammation in my stomach close to the small intestine. my gall bladder test came back normal. what could be causing all the vomiting?