help?

Everytime I eat I feel sick. 
Half of a sandwich? I feel like throwing up.
Coffee? Nope.
No pizza, no fish, no cheese, no tacos. 
Chocolate especially. 
I weigh 110 pounds and I'm 5'4". 
I feel like throwing up constantly after eating and I usually have to wash down everything with water and nothing else. Washing it down with soda or milk makes me feel more ugly as if I have a stomach ache. 
I tried googling this but outrageous things like bulima come up and I have yet to actually throw up in these situations nor do I binge eat in any of these situations.
Do any of you know what this is or have you experienced this? I really am concerned since it really does take away from me actually enjoying my food.