Rob
That is disturbing both on your own personal level, but also in the wider picture. I have heard from time to time, but not necessarily emphasised, that while the initial symptoms fade away there can be residual issues. In my layman's terms it appears to trigger other problems that may or may not have been latent. However, I don't know that this has been accepted universally at this stage, although it is an insidious reminder that Covid-19 is unpleasant and more serious than just "a bout of the flu." There are a number of diseases that have the capacity to linger. Glandular fever springs to mind and possibly Covid-19 has the same abilities.
I hope you make a full recovery soon.
Regards
Paul