You don't need antibiotics for a sore throat; gargle with salt water, eat more garlic and onions, pop vitamin C lozenges to suck on, along with medicated throat lozenges.
I start with Web MD and other sites that allow me to narrow down what I have. If I'm not certain, my insurance has a help line and I can talk through the symptoms and get their input on a diagnosis. Only if I can't figure it out do I bother seeing a doc; fortunately, thanks to the religious folks who run the hospital and clinic here, there's an Immediate Care section where the longest wait I've seen was forty minutes.
You absolutely need to use antibiotics for strep throat, which can lead to rheumatic fever and heart valve damage.

