The Trauma center will give you an unnecessary dose of x-ray radiation. They rarely have top line neurologists on duty so they take a shotgun approach looking for the most serious issues. A CT Scan is 100 to 200 times the radiation of a simple X-ray. Avoid them unless there are real indications of a need for the radiation exposure.

Vasospasms are not a risk. They are just painful.

Sounds like it could be pre-migraine aura.