Rtpcr is not recommended. Keep mask on for 15 days since onset of symptoms. This is for the safety of your family members. Risk factors for Mucor : Uncontrolled diabetes Hospital environment contamination Steroids high dose Immunosuppression HIV Unsterile masks You have no risk factors. It's a good thing to be aware of the fungus (it has always been around us) rather to be anxious and scared about it.

you can take off your mask if you are  covid   negative However it would be wise to keep wearing it when meeting people you don't know

Get repeat Rtpcr done if negative can take down mask at home. Don't worry about the fungal infection. Just have good diet and maintain good sanitation