Thanks for your query.
You felt unwell and sick may be because of indigestion and acidity or may be you are allergic to the food or there might be chance of bacterial contamination of the fish.
Did you have the same kind of fish before too? Did you have any problem then?
Did you feel any change of smell or taste in your food ?
Did you have any fever or bowel disturbances too after eating?
For the time being as you are having acidity take proton pump
inhibitors like pantoprazole
For nausea take ondansetron
And go visit your doctor and take his advice.
Hope this helps.
Update here how you stay.
Disclaimer: The Expert’s advice is provided for general informational purposes only and SHOULD NOT be relied upon as a substitute for sound professional medical advice
, as a complete assessment of an individual has not taken place.Please consult your nearest physician before acting on it. The advice is not valid for medico-legal purposes also.