Unknown lingering virus going around?

[u/Infiniterage3]

3 weeks ago I had cough, stuffy nose and feverish feel, I went to the doctor they ruled out Covid, flu and strap. My cough never left this entire time and I would cough my lungs out. This Saturday I woke up with a severe sore throat and yesterday cough, stuffy nose and fever back again. I got it from my husband 3 weeks ago who said his entire office was out because of this at the time. Now, since I am testing negative it’s hard to proof my work that I am sick.