Hi and welcome to the Chiari forum.
The Belly Dancer Syndrome is a rare one and one that has not cropped up here before.....panic attaks have.....head pressure , yes, weird movements, sometimes referred to as trembling, or just odd shaking movements have been experienced by other members.
I am curious if you were DX with any other related Chiari conditions? Syringomyelia , Tethered Cord, Ehlers-Danlos Syndrome?