Personally, I believe the scan aspect is a good idea. The brain can definitely do some freaky things at times.
I'll try and keep this short, as this is more about you than me: Was having terrible anxiety attacks a few years back, accompanied by loss of sensation down the left side of my body, amongst other things. I could tell when these attacks were coming on as they would begin with slight sinus pressure. GP insisted I start on anti-anxiety meds. I insisted I don't and that he get to the route of the problem. Long story short, saw another GP who is an absolute legend. She ordered an MRI scan and, bamm, 'silent migraines' (migranes without headaches). Original GP was surprised to say the least.
Fortunately, I was having a migraine whilst in the MRI machine, so it showed up. Unfortunately, if the problem is not happening during the time you're in the machine, it may not show up. If the episodes you're experiencing happen at predictable times or are triggered by something specific, that you're aware of, this could influence when you schedule a scan.
To this day, I believe the 'anxiety' was a symptom rather than a result of the episodes, if that makes sense. Maybe the fight/flight/freeze aspect kicked into gear when there was a migraine associated change in my brain's relationship with my nervous system. Quiet a weird feeling! Short term blood pressure medication seemed to right things.
I hope you are able to get to the bottom of things whose_da_man88. Diagnosis can often lead to the best course of action.