Hello dear
Understand your concern.
Cause of your problem are below:
1. Severe gastritis
2. Ulcer in stomach or duodenum
3. GERD
4. Food poisoning/allergy
5. Viral disease: Hepatitis
Do the following test
Blood CBC,
ESR, LFT, KFT, if needed
endoscopy..
Take following treatment:
Diet care:
1. Eat when hungry
2. Small frequent diet
3. Avoid spicy fatty foods
4. Try to take Herbal tea, cracker, unbutterd toast, gelatin contain desserts help to reduce severity
5. Take more carbonate beverages.
Drugs
1. Tablet metroclopramide: 5-10 mg orally 4-5 times/day
2. Tablet Promethazine: 12 mg rectally 3 times/day if very severe
3. Injection ondensaterone 8 mg in unresponsive case
4. Tablet
metronidazole 400 mg twice daily for 3 days
Hope this may help you.
Wish you good health and faster recovery
Best regards
Dr. Sagar