Every medical professional worth their salt knows that tests are not binary - there is a possibility of false positives. They sent her for another test where results would come in two to three weeks, but that doesn't excuse them treating her unprofessionally. I recall there was a case where the guy was getting a colonoscopy or something along those lines and the doctors and nurses were making derogatory comments about him while performing the procedure (he wasn't completely under), he managed to sue and win some money.