I guess they have to see what's going on in there @bensmith
As usual, it's a diagnostic procedure to eliminate something that just might be happening. They have to cover all bases.
While not exactly an MRI, I had a brain CT scan about 18 months ago. It was easy as pie. I worried about it beforehand, but there was nothing to worry about. It was over quite quickly. I almost fell asleep while in the scanner. It was nice to lay down and relax. It was a bit hypnotic.
The only thing that bothered me was having to drive myself to the hospital and back in pouring rain on busy roads, and get up way too early. That did crash me for a few days.
Would you have some easy transport to the appt.?