Help me with this conundrum please:
My daughter had covid last week, falling ill on Monday 31st - two days later (weds 2nd), I came down with what I assumed to also be covid - heavy fever, fatigue and flu aches, though no cough or sore throat - I was negative on the lateral flows, and my PCR was also negative, but I isolated anyway as it seemed most likely the tests had missed it somehow. On Monday I developed a sore throat and a cough, but was still negative on the lateral flows. I forgot to test yesterday, but today, I'm now testing positive.
So I need to isolate until it's 10 days from the first date of symptoms: is that last wednesday (so friday this week) or do I count from Monday this week (next wednesday I guess)? Is it possible I had a separate cold last week that's run into a covid infection this week without a break?