Thanks for all these additional information.
I understand your concern.
Well as you describe,possibly it's stomach infection.
And you should take OTC Zantac or liquid Emetrol.
Also take OTC Aleve and Mylanta gas.
You should start metamucil and probiotic.
Hydrate yourself with plenty of fluids.
Eat a bland diet.
You should monitor your blood pressure also.
If pain'll get worse or persistent then see your doctor and undergo ultrasound whole abdomen for further evaluation and management.
Take proper rest.
Avoid fat rich,spicy,fried,greasy,very hot foods.
Let me know if you have any further query so we can discuss it thoroughly in every aspect.
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