i am 16 years old and for the past few months, about 3. it's happed before, it didnt just start, i throw up my stomach lining, it yellow and stringy. in the middle of the night i always wake up to a strong pain in my stomach, in between my ribs. it doesn't only happen then, it happends through out the day to and the only thing that helps it feel better is to eat something, but it's not a hunger pain. any suggestions?