With only a few walk-in clinics nearby, HealthCARE Express may be your best option for immediate care in Atlanta. They are open today from 1:00pm to 5:00pm, as well as 7 days a week. As long as you visit them during their business hours, you should be able to walk right into 106 S. Loop Hwy. 59 and be seen relatively quickly. The national average for patients waiting at an urgent care is between 15-30 minutes, so hopefully it shouldn't be too long of a wait.