I've been suffering from the worst sore throat I've ever experienced (including covid), am blocked up with phlegm and feel generally down and have constant headache. Tested for Covid a week ago (neg). I'm a pretty fit healthy chap and normally shake off colds and flu quickly. it was bad for five days but then eased a bit before coming back even worse. Anyone else suffering? really getting me down, living on a diet of paracetmol, throat sprays and the like.