Could it have been Covid-19?
I keep seeing lone posts about this but no thread.
I became ill with a cough/chest infection thing in early December which wrecked my health all month. I remember feeling miserable over Christmas/New Year. I kept waking up coughing. I found it hard to catch my my breath just walking upstairs. It took over two months for the cough to go away. Interestingly neither of my DC caught it/were affected apart from the older saying she felt a bit "blah" for a few days.
So is it a possibility it's been here longer than we think and many of us have already had it and recovered without realizing? Or the other option which is that it was just one of the several viral things that go around every winter and not CV at all?