I’ve had this several times and I don’t think it was common cold but die-off. If it’s magically gone in day or two then it is. If not, then you got a cold. This is how I evaluated it.
Few times I had a sore throat so bad that I was sure I have a cold, but next day it was magically gone. Normal cold does not go away by itself in one day.
Either way, do what you normally do already as part of the treatment: drink plenty of liquids, vitamin C…