CHEARS

Since you are developing vomiting after you eat, you can switch to fluids or juice until your problem is resolved. If vomiting is persisting take ondansetron 4 mg and pantoprazole 40mg from any near by pharmacy stores.
Try to drink ginger soaked in water and also oral rehydration salt.

Have you eaten any food outside? It might be due to any bacterial infection that causes vomiting. Take esomeprazole + Domperidone tablet early in the morning with empty stomach. Try not to eat anything. Take fluids instead or take hot water.
If you are having loose motions too then also take lopermide 2mg. Two times.

It's better to perform bloodtest to treat according to your infection

You have diarrhea? Or vomiting only? If you can go to pharmacy please take patoprazole 40 mg and domperidone tablet and take it before food. Take ORAL DEHYDRATING SALT and drink it frequently. Consult the nearest physician if problem worsens