Does it seem concerning to wait until Thursday or is it better to go to the emergency room?

If you have already tested negative for COVID-19 and your symptoms seem manageable with over-the-counter medication, it may be okay to wait until your appointment on Thursday. However, if your symptoms worsen or if you develop a high fever that persists for 72 hours, it would be best to seek medical attention sooner. It's important to monitor your symptoms closely and seek help if necessary.