Stomach flu. Pain again. what can i do.

I am suffering from a continuous problem of a stomach flu from past almost 2 months. My stomach starts paining alot in the upper part and loose motions don't stop. I was on antibiotics for the first month after treating the loose motions but it didn't got better. There was nothing in the blood tests and ultrasound except some gas lumps. Than i changed my doctor and she advised to stop the antibiotics and go for probiotics and change the eating habits and evrything. I am still on probiotics with a less dosage. I am wearing loose clothes to avoid the tightness in stomach, i am eating healthy avoiding chillis and everything. But still I feel I have to go to washroom and empty my stomach after anything I eat and it's not stopping. I am even eating light food in small amounts taking fruits like banana and avoiding juicy fruits but it's not stopping. And even after few hours of sitting i feel the pain again. What can i do.