You could well be correct, but I felt fine except for the days when i couldn’t draw a breath. That had never happened like that before.
The dry cough that wouldn’t leave was also new and different.
No temperature either, which would have indicated flu., so I’m not convinced either way.
The oddest symptom by far was after a week or so, everything tasted bland/terrible. I lost weight because I didn't feel like eating. It wasn't nausea, but there was some of that at the beginning.