WINDER, Ga. — About an hour after gunfire erupted at Apalachee High School, ambulances started arriving at nearby Northeast Georgia Medical Center Barrow with two students and two adults suffering from panic attacks and extreme anxiety, not bullet wounds. A fifth patient with similar symptoms later arrived at another local facility, according to a health system spokesperson. The day after the Sept. 4 school shooting that killed two students and two teachers, some 80 families showed up in a county office to receive counseling from volunteer therapists who converged from across the Atlanta metro…