This is all very interesting, thanks for the replies. Especially interesting from those of you who have had positive tests like @ChristmasCarcass. I do realise they are not foolproof but that is good news @cptartapp that you had a mild version of the illness, had been in Sevilla and tested positive and you @Moondust101 having been confirmed to have had it presumably while ill in December.
Now you mention the conjunctivitis @babybythesea
I had heard that it was around earlier but I guess I just didn't expect it to have touched us personally - especially in my 7yo DS. So many of us have said they think they have had symptoms of it but who really knows until we get the test. After DS was ill I had a wheeze for about six weeks (I don't have asthma officially but many years ago had an awful cough and since then have occasionally had to use a blue inhaler) and had to use an inhaler quite regularly which is unusual for me. But who knows! I would love us to have the tests.
For the wider population on the whole I also would love it to be the case that many of us did have it as it would mean that a) we were hopefully immune, if the antibody theory turns out to be correct and I realise that the jury is still out and b) that the illness was mild enough not to hospitalise us and also even milder in many cases.
Interesting what you say about your DD @Sipperskipper. In fact although DS' really bad symptoms happened when we were in Spain he had definitely had the cough for a longer period before we went out to Spain. It just got really bad on Boxing Day and that was the night he coughed for 5 hours non stop. I had actually been worried about his cough going back a lot earlier, to late September, but obviously that seems way too early for it to even have been suspected early Covid. Then again you suspect yours might have been @LemonadeAndDaisyChains. But it was just very very severe by the time we got to Spain at Xmas so I am guessing maybe that might have been two separate issues. Or of course it was just one long cough issue and nothing to do with Covid.
I should say I am not saying this with any conspiracy theory in mind, I like you @Fatted think the idea of it having been around earlier makes sense from a non conspiracy point of view. Incidentally the specialist that called us from the hospital (initially calling in regard to my younger child to check up on his asthma) is a very sensible and straightforward doctor and I can't for any moment imagine she would be thinking in terms of conspiracies either, just that it was around a longer time than we think.
I've seen it speculated that because initially it was circulating amongst less vulnerable populations -so workplaces, schools, universities - the number of deaths was relatively small. The death rate rose when it started to spread amongst more vulnerable people, and became really high when it got into care homes this would be great @SaskiaRembrandt wouldn't it? Again for reasons such as immunity (if that turns out to be 'a thing') and confirming that it can be reasonably mild for a lot of us.
And yes @Smileyoriley I take your point. The cough that I had many years ago that lead to me needing inhalers was probably the same in terms of cough symptoms but obviously not Covid.