I'm so sorry to be replying one month later. I've been on a mental, emotional and physical rollercoaster. I have followed the dietary restrictions (no fatty food, fried food, coffee, sugary and processed foods, citrus etc to at least 98% faithfully yet I've come to see that what I eat or don't eat doesn't affect the symptoms. I eat bland foods like rice, potatoes, steamed vegetables and lots of fruits especially bananas, watermelon, blackberries, strawberries and apples. I am doing the best I can so far. Some days I'd get by with no symptoms only to be hit by severe nausea for the next 2-3 days. I do brisk walking but not daily. No surgeries done for any condition. I have siblings who suffer from IBS and also gastritis. But they all have it under control.
I live in Abuja Nigeria and have seen experienced gastroenterologists in the best hospitals in the city who have told me the line of treatment for my condition is PPIs and wouldn't change even if I flew to another country for treatment.