So I ended course my doc gave-PPI, antibiotic & noworm tab for my stomach issue. But even now still if I eat egg, fish;diarrhoea, constipation occurs.

Which one. Are you getting both diarrhea and constipation the same time or some food give you diarrhea and other give you constipation and stop eating the food that is bothering you . Your body telling that there is some food I do not like I stead of listing get to it you are trying medicine to force your body to accept what you like . Listen to your body you are having IBS .