Hi. Thanks for your query. Noted the history and understood the concerns. Fever with gases, flatulence, burping and intolerance to oral food can be due to a mild form of Gastroenteritis. Hence I would advise you the following: Get the tests of stool and blood. Take a PPI like Omeprazole. Antacids orally at three hourly. Consult your Doctor for clinical evaluation, examination and correlation with tests. A course of an antibiotic may be required if there is any evidence of infection and may help to correct the problems. Take soft and bland diet, small frequent quantities. Plenty of oral fluids to avoid dehydration. Probiotics, bananas. activated charcoal and yogurt may help further.