Long story short, it's already been a week since my first symptoms (the cough). And it seems like things should be getting easier, and they noticeably have.
But!
Breathing is still uncomfortable, I have a bit of a cough, weakness, and a bad mood. I can't smell anything, don't feel like eating. I sleep for a long time, but don't feel very well-rested.
My sick leave ends on Wednesday. I guess I'll decide then whether to stay home until next Monday or go to work. Overall, nothing is really stopping me from working, except that breathing is uncomfortable and I'm feeling down. But those aren't exactly minor things.
COVID, of course, is nasty crap, what can you say.