Oh, forgot to add....

Have had multiple CT scans (w/o contrast), an MRI back in April w/contrast, and an EEG. All normal except for a very small non-specific gliosis (radiologist said likely nonsymptomatic) in the left lentiform nucleus that showed on the MRI.

One note about the EEG - during the hyperventilation part, my jaw began to have tremors, but the EEG didn't show anything.