I have been feeling nauseous for two or three weeks now.
I have been feeling nauseous for two or three weeks now, I think it helps when I eat something, sometimes I have a pain at the top middle of my abdomen that seems to go through to my back.
Your symptoms could be explained by a number of conditions, the most likely of which is a peptic/stomach ulcer or some similar stomach acid problem. This characteristically causes upper abdominal pain which is worse when the stomach is empty and therefore eased by eating. The pain often radiates through to the back. My suggestion is to see your GP for a proper examination and diagnosis, but in the meantime see if taking antacids which can be bought over the counter helps your symptoms.