Burning and pain in ‘burning in my throat and stomach after I ate, and drank, even if I was just drinking water’ is usually due to
gastric ulcer, severe acidity, gastric reflux, stomach cancer, hiatal hernia or gall stones.
If you have irregular eating hours, or do not eat healthy or are taking any medication like contraceptive pills then it could be severe acidity.
Treatment is a combination of drugs to reduce the acid and lifestyle changes.