I finished 9 days of isolation yesterday. I got a positive antigen test on New Year's Day and so did a friend who I was with the day before. Unfortunately, probably partly due to the holidays, it took just over a week to get a PCR test (my friend somehow got theirs a couple of days earlier). The negative result came back last night, so I've finally started 2022 a week late! The most annoying thing is that halfway through last week the brand of antigen test that gave me a positive result was withdrawn from shops amid reports of false positives. In the end, I probably never had Covid, but you can't be too careful.