Ineed questions about the effects of concussions asap

The coach pulled my child from the game after she collided with a teammate. She got up and stumbled and looked dazed, but said she felt fine except for a mild headache. Is it really necessary to take her out of the game?
My child did not lose consciousness. Does this mean my child did not have a concussion?
Do I need to wake my child up every hour when s/he is sleeping?

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.