Thanks for writing your query.
After reading your post, it seems that you might be having gastrointestinal tract infection along with gastritis. This is a curable condition.
You may continue with the medicines prescribed by your doctor friend. These will help in controlling the infection.
I would advise that you should add an antacid like Omeprazole
40 mg once day before meals. A probiotic daily along with digestive enzyme
preparation containing pepsin and fungal diastase after meals will have added benefits.
You should eat light meals prepared under hygienic conditions.
You should drink lots of water daily. Avoid spicy and oily foods.
Also avoid smoking and alcohol, if any.
Since you are having burning sensation in esophagus
, I would also advise that you should get an Endoscopy done.
Gastrointestinal tract infection will not cause high cholesterol
and BP levels.
Increase in blood pressure can be related to high cholesterol levels.
Regular exercise and healthy lifestyle will help in controlling your blood pressure and high cholesterol levels.
I would suggest that you should get yourself clinically examined and investigated.
Following investigations may be helpful :-
1. Lipid profile
2. Thyroid profile.
5. Kidney Function Test(KFT).
I hope this is helpful to you.