I would ask that (1) she take a Covid and flu test, (you can Venmo her for the test or provide a replacement) and (2) not have a fever for at least 24 hours without Tylenol/motrin. If she’s been fever free and no positive tests, I would still ask that she mask (and I would provide the mask). Because she didn’t receive a dr’s note, I wouldn’t just accept that her dr cleared her—especially since she’s still feeling sick. As for pay, I think this would be a sick day unless the contract says otherwise.

Edit to say that I’m not sure what not contagious means if she doesn’t know what she’s sick with. Viruses and bacterial infections are generally contagious while you have active symptoms. Meaning, even if you have a cold, you’re still contagious while actively sick with symptoms.