If it is only a few days later, it might be the normal covid19 pattern. I have been warned by a doctor of this two steps pattern when I got it, which I understand corresponds to infection by the virus first, then bacterial infection as a result of the damage caused by the virus.

Not a doctor, but just my understanding from [1] though I start seeing people challenge that pattern [2].

[1] https://www.youtube.com/watch?v=BtN-goy9VOY

[2] see responses to: https://news.ycombinator.com/item?id=22786656