Okay so I'm a 16 year old female, and last week I had a flu or something and was vomiting for a few days and couldn't keep any fluids down, since then I have gotten better but for the last 3-4 days I've had a persistant ache/pain in my back under my ribs (mainly on the left but also on the right) and also pain in the upper part of my stomach, it is keeping me from sleeping, any idea what this might be?