Hello, what you have is sore throat due to gastric acid reflux. The alcohol and smoking stimulates excessive acid secretion. Most of the time it should resolve by itself in few days if there is no further stimulation by alcohol or smoking or spicy oily food. Rarely there can be infecion setting in the throat. Is so the you will need antibiotics.
Next Steps
Try the tips below, if still persistence then consult an ENT specialist online or locally
Health Tips
1. Avoid alcohol and smoking for few day atleast
2. Avoid spicy oily food items
3. Take bland food
4. Avoid fasting
5. Take digene or gelusil tablets or syrup every few hours for few days
6. Do warm salt water gargles