There's a difference between the kind of quarantine expected with a positive test vs not knowing. Once you test positive, you're not supposed to leave the house

There's a difference between the kind of quarantine expected with a positive test vs not knowing. Once you test positive, you're not supposed to leave the house at all for 14 days, and only then with clearance from the local health department (or physician depending where you are). If you don't know for sure that you had COVID, it would be reasonable to go back out after your "cold" symptoms alleviated. Part of the trouble is that there seems to be a lot of variation in symptoms in people who test positive.