And, stop getting tested for it!
If you've got the flu, you've got the flu.
Vitamins C and D3, Zinc, Quercetin, chicken noodle soup, tomato soup, a hot toddy (or 3 or 4, haha)... and rest. Do what it takes to sleep... if a cough keeps you up then take some cough medicine! It's amazing what the other "C" word--Common sense--can do for you.
And FFS stay home and get well. Use your sick days if you are fortunate enough to have them. Or use your vacay days if you have them and must.
I know I am preaching to the choir. This sort of got away from me and turned into a mini-rant.
Carry on!
PS: notice I didn't even need to say the "C" word.
Cough medicine? I agree with your post except I don't recommend the cough poison "medicine". Use natural medicines like cannabis or echinacea.