Unconscious after shock. A paediatric.

My daughter is 5 year old. Yesterday while playing she fell down from a swing and became unconscious for a minute. She fell down on her bumps into the mud. Though, she is completely fine now. No external injury. But I want to consult a doctor, as she had become unconscious for few seconds twice at the age of 2. Both the time, she fell unconscious by hurting her finger while playing. That time, we had consulted a paediatric and he suggested nothing is serious it's just due to deficiency of iron. He prescribed iron syrup and we continued it for a year. For last 3 years, she never become unconscious except yesterday. So please tell me should we consult a neurologist to discuss the issue or again consult a paediatric. Thanks in advance for the reply.