NEW: Smoke shop employee was beaten, pistol-whipped and shot at during a robbery in San Antonio
The employee tried to fight back, but was pushed to the ground and dragged toward the door
She believes the suspect fired a shot near her head to keep her from moving
She reported hearing ringing in her ear and smelling gunpowder right after
Police say a second suspect went inside and took items and cash, while a third waited in a getaway car
No arrests have been made