If I get a test and I test negative that means I’m fine, right?
No, not necessarily. The Covid 19, like any other test, only tests for the current state, and means only active infections. You may have been exposed but not infected yet, which would result in a negative test, even though you could pass the infection to others. The CDC suggests that testing is best used to confirm suspected cases to help with exposure tracing and managing the disease in those who have more severe illness.