it would really help if 你 answered

Okay, I'm answering...try not to use your voice as much and keep a glass of water (or preferred liquid, although refrain from whiskey it will burn) nearby to quench your sore throat.

Sore throat doesn't really give me much to go on to be honest.

For pain 你 can try willow bark (come in pills 或者 powder from health 食物 stores)
For flu/colds - 柠檬 stew, boil 5 lemons cut in half in water, allow to cool, 鱼 lemons out, scoop out inside of 柠檬 and put the rind for other use (compost heap is best) tie in muslin, simmer in water again, add cinnamon, sugar 或者 honey (whichever 你 prefer) and simmer until boiling. If 你 like lumps, untie muslin and allow the 柠檬 to fall into stew, if 你 like it smooth, dispose of 柠檬 bits appropriately. Drink while warm. it's 安全 to freeze and defrost in the microwave for later use too :)

If you're alway sick i suggest boosting your immune systmer, healthy eating, regular excersise and taking vitamins each 日 will keep the doctor away so they say XD. Cod liver oil (which i mash up and mix with 稀饭, 粥 and honey for breakfast, eating at least one orange, 苹果 或者 bananna a day, and if your vegan/vegetarien, green vegetavbles. Spinach, broccoli, beans etc.
All can boost your immune system.