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Thank you for the question. Answers given are for informational purposes only and are not meant to replace an exam by an in-person.
I am Dr. Sohaib, a Medical Internist (who deals with diseases of all the organ systems of body) and I will do my best to find an answer for you.
As per standard guidelines every case of head injury or trauma should be evaluated at earliest in ER.
A comprehensive clinical examination aided by tests like X-ray/CT of the skull help rule out any serious possibility like a fracture (which can be a small hairline fracture) as well as intra cranial bleed (a slow organizing hematoma which can give serious symptoms few hours after the impact).
So ruling out any such possibility will put your mind at ease and will also help direct further management plan.
So yes, ER is the place where you should be right now.
I hope this clarifies and answers your question.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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