I have a really sensitive stomach, anything i eat makes my stomach hurt and i throw up if i eat greasy food.

& your question is?: Yours is a common but nonspecific complaint. Need to rule out infection, malabsorption, inflammation, ischemia, dysmotility, functional issue, or even a problem outside the gut. Medical evaluation is recommended appropriate to the duration of your symptoms, associations (bleeding, weight loss, pain, vomiting), as well as your other medical co-morbidities. Call your doctor please and get checked.