Came down with Covid this week with those exact same symptoms. When I said to my doctor, I thought it was just the cold that's going around. My doctor said, 99% of the cold that's going around is covid.
If it's covid, and you have any health issues, consider asking for a Paxlovid prescription. I tolerated it well--no effects at all.
Otherwise, stay active if you can; don't lay down other than sleep; mucilex, fluids, gatorade, and stay active.
That meant for me doing chores around the house and in the back yard, sitting up watching TV, getting up to pee from all the gallons of fluids.