For a sore throat, gargle with 2 tablespoons of Apple Cider vinegar in a cup of warm water. Gargle and spit and repeat. When you have just a bit of the liquid left, swallow. It will burn a bit, but will help with the bacteria further down your throat.
If it is a really bad sore throat, a great homeopath to use is Belladonna. Take 3 - 4 pellets under your tongue, 4 x daily. Make sure you don't have food within 20 min of taking any homeopaths.