Had endoscopy and all biopsy came back beign. stomach lining very inflamed. taking protonix twice a day and prescription pepcid at bed time for gastritis . feel really good one day not so good the next how long feeling this way?

I'm not sure that you need the pepcid. How about taking a liquid antacid like maalox or gelusil 1/2 hour after meals and at bedtime? Avoid spicy foods, caffeine, alcohol,aspirin,and anti-inflammatory meds like ibuprofen or naproxen. A different ppi, such as nexium, could be tried if not improved after a few weeks. Your gastroenterologist is best to advise you, however.