You may be suffering from a mild concussion. To be perfectly honest the best course of action for any type of head injury is to get a neurological evaluation. That way, there will be a baseline of functioning that will be available in case symptoms or other things change. Your symptoms are highly suggestive of what we would refer to as postconcussive headaches or postconcussive syndrome. Again, it would be best to be seen by a physician (preferably a neurologist) before starting to take any medication for the pain. Just seeing spots in the dark is of no consequence. You will likely get over these symptoms in several days to several weeks if the condition remains uncomplicated. If you have further detailed questions you d like to ask or I can be of more help please address your questions directly to my attention at this network in the PREMIUM section (DARIUSH SAGHAFI, MD). I wish you well. If this answer was of value to you then, a STAR RATING of its quality would be greatly appreciated by yours truly.