You can eat apples to relieve stomach acid. If you have too much stomach acid, you can eat more alkaline foods: soda biscuits, burnt bread and drink more black tea. Severe stomach acid: Ginger and Puercha can be used to cook and drink soup together. Diet is mainly light, do not eat before going to bed, do not smoke after meals, and put the head or bedside mat higher when sleeping.

I hope it helps you, and I wish you a speedy recovery.