Body inflammation after having food.

Hi, I am feeling inflammation of the body like internal fever after having food. Even curd rice makes me inflammation. Taking blend diet only. When I feel inflammation body, urinating more like anything. Feeling very much tired. I have mild gastritis. My stomach starts burning when it is empty. If I eat anything then immediately feel body inflammation nd it makes me to urinate more. Not even taking any spicy,oily,outside, processed foods and sweets. Only bland diet.did endoscopy 8 months before. No h pylori and only mild gastritis. Kindly suggest what might the reason. Blood tests are normal. How to find out this issue. My urine culture and stool culture also normal. I m helpless and not sure what test should be taken. Desperately need your help and suggestion. Thanks and Regards, Ramya