Can you tell me how i can protect my throat if i throw up ?

Throat: Aside from drinking lots of water and gentle gargling with salt water, there is not much to do. The membranes of the throat are able to heal themselves pretty well

Vomiting: bend down and lean your head forward. The refluxate will not go into your airway if you lean forward. Otherwise, if you are asking about minimizing the irritation of the pharynx from acidity of the refluxate, you can drink antacid. If you have bulimia, seek expert mental health attention as it will cause much more damage over time than can be improved with antacids.