While I feel like covid probably had some effects on some people after the fact. Seems like "long covid" is a cop out for some doctors unfortunately. At least it was in my wife's case when they didn't want to dig any deeper into some problems she was having in 2021. The 4th doctor figured it...
Maybe you have more than covid. Kids and wife had some sort of virus (I don't remember which one it was but it wasn't covid) this past winter. They had the worst cough I've ever witnessed for 6 to 8 weeks. Probably 10 or 12 weeks until it was completely gone. Couple hospital trips. It was brutal.