Head ache and digestion related.

I seem to get headache on left side of head starting at the eyebrow area when i eat food not prepared at home. After a while this is followed by vomiting even when i have water, and there is uneasiness till anything eaten/water taken is vomited. It does not happen all the time but any spicy preparation increases chances of this happening. Felt this last week and consulting doctor at work said this is gastroenteritis. after that, any slightly spicy food causes burning sensation in the stomach. Also, i have disturbed sleep because i attend to my 2.5 year baby. This combined with my office schedule, i tend to feel headache and tiredness in my head/shoulder are sometimes. Please suggest an ayurvedic treatment/process for my concerns.