Pain during swallow. Soon sir/madam.

Since saturday morning i have been facing pain while swallowing food, water,during talk in the throat on left side of neck. To be frank I drank glass of cool lassi at friday afternoon. The pain is less former and became high later which I don't know the reason for this despite it happens to me atleast 1 time in a year since 5 to 6 years up to my best known . For every time it happens I vomit mix of salt and turmeric warm water and then it goes. But now it exists for 2 days which made me worry about this. So I literally want to know the reason why it happens. Yesterday evening I went to RMP doctor where he said there is an infection on checking throat with torch, gave some injection and tablets. At night it felt like pain got lessened and in morning the pains remains the same yet. So please make me lightened with knowledge and option to get out of this soon sir/madam. Thank you...