You are all forgetting he bought an ILX and was trying to make everyone in the Garage jealous.
Not exactly the sharpest knife in the drawer.
Anyways getting back to the point, I get people like this all the time. They see some shit online and think they have a brain tumor because of a little headache they have. Chances are its nothing, but he hasnt said what any of his symptoms are. Find a competent GP/FM doc and go from there.
Going to a imaging place may or may not work, they will usually say that a script for a procedure is needed before taking place, unless they want to assume liability for your care. There may or may not be lab tests involved before doing a CT, depending on the type involved. Even then, the radiologist would only describe what he sees, it may or may not be anything. It would be a neurologist call after that.