Right, so I was hale and hearty when I arrived at my sister's place just before Christmas. However, some kind of bug had been going round her household before I arrived, with multiple LFTs giving negative results. While they were no longer symptomatic by the time I got there, I unfortunately caught this bug in short order, as did my mother who arrived shortly after I did.
I did an LFT which turned out negative. My mother required a negative PCR result in order to travel back to Ireland, and that is what she got. So while I'm not completely certain that it wasn't Covid, I'm mostly confident that what we had was a nasty cold. That confidence has been slightly eroded after reading this thread though.
I had a whole barrage of symptoms, including a stuffy nose, blocked left ear, tinnitus, sore throat, excessive and thick mucus production, sinus headaches that changed position, a cough that started off occasional then for one night only got really bad, and the crowning glory of a feverish dream in which I felt like I was fainting. A very weird illness with a bizarre array of symptoms that changed day to day. Not had anything like it really.