Acidity and loose motions both.

My mom ,age 55 and had been given manier meds as I had covid in Dec .I was treated at home but the meds given were too many I take TEMSI am for BP and I am Thalassemia minor .normally also I have frequent motion and have a sensitive stomach.ibs syndrome Post which I am having the below From Jan till date she has following issue 1)There is pain even if you touch with finger (left of naval) at times ..also pain in naval till centre of chest at times .the entire centre line 2) Severe Burping and flatulence 3) There is heaviness in chest and choked feeling and headache and throat (cough ) at times a d feels speechless  only when gas is accumulated 4) Chills and hot flushes Please give something that  will help with Acidity ,gas and motions .. I'm v worried . endoscopy ,stool test is normal .I feel it's gastritis but can't take much of medicines