FWIW: I find the fastest resolution to flu et al is a good night’s sleep under a mountain of blankets. Body naturally raises temperature when sick because that tends to kill of viruses (more heat-sensitive than human body), so help it out by getting as hot as you reasonably can for as long as you can. The whole “break the fever” etc is the wrong approach (unless actually getting dangerously high temp). Getting chills? heat up and sweat it out.
Since Covid19 seems like Flu++, similar “get hot” treatment may work (lacking any other medical guidance).
If you honestly think the normal flu can be fixed by a day under blankets, honestly you do not have the flu.
Not to dismiss your treatment—but if you don’t have a fever, feel like you’ve been hit by a truck, and can barely move for a few days...you don’t have the flu.
In your case, that might be true. But in the world of flu treatment...people (not you) toss the term flu around loosely.