Drink more water. Have salt water in your mouth for a while, and spit it back out.
The salt will kill the cells in your throat, or the bacterial infection.
Check if your throat has white patches a.k.a streptococcus or strep throat.
If you go to the doctor's they'd probably give you amoxicillin to fight the bacteria.
If it ain't bacteria, then you got a virus which cannot be cured by prescribed drugs, and you're on your own.
Try drinking some Gatorade also. It's a good source of fibre to give you energy