I don’t believe I have covid at all. So why the hell am I at home?

I feet horrible yesterday. I already called out of work for a couple days. I don’t wanna get fired. Fever, chills, aching, headache, soar throat. I’m still congested, have a cough, a headache but my soar throat is gone, my fever is going down. I know the test says positive but I still don’t believe I have covid. My parents don’t think I have it and I should go to work tomorrow but the test said positive. My dad said the test could be a lie and I sound better when I talked to him on the phone.
Why am I at home?! I should be at work.