I don’t know about everyone else but my house constantly has a cold at the minute. After each cold I get really bad sinus pain but for months now I have a sore throat it gradually through the day gets worse that I need to take painkillers. It’s down one side I spoke to the gp over the phone who said it was heartburn related..as at that time I was having heartburn but I haven’t at the minute and my throats still sore