Thank you for consulting with Healthcare Magic.
From your description of symptoms I'm inclided to think in terms of some kind of obstruction for the food passage from stomach.
I'd also need some more specific details like
-How much time does it take before you throw up after food intake ?
-What is the consistency and color of the vomitus ?
-Does it pain when you swallow food ?
-Is the difficulty more to solids or liquids ?
These details would help me to make some more specific comments on your condition.
The sour mouth could be due to nutritional deficiencies associated with your present condition.
My advice is you get yourself examined by a
general surgeon and get an upper gastro intestinal scopy done if needed.
Wish you good health. Please revert back if you have further queries ?