Thanks for your query
Yes you could have a concussion.
Symptoms of a concussion can range from mild to severe.They include :
-loss of consciousness
-Nausea & vomiting
And in severe cases there may be seizures,repeated severe vomiting,prolonged unconsciousness
etc and need immediate medical care.
Dont waste time and get a medical checkup done from a neurologist
and an ENT specialist
and get a CT Scan of brain done.Update here how you stay .