Why does alcohol burn when it goes down my throt. And why does my stomach hurt after a little wine.

Toxic. Alcohol can damage cells. In your stomach it tends to promote ulcer formation. Listen to your body. If it hurts when you drink alcohol, then it would be best not to drink alcohol. If you hit your fonger with a hammer, would you smash it again?
Gerd. May be related to gerd or other ulcerstions... See your physician or gastroenterologist to see if you need medicine or an endoscopy...