Hi Lucy,
I kind of felt like I was reading my story, I don’t have everything you do but have had some in the past.
At first I thought it was partial seizure, but it turns out to be migraine. Who would have thought someone could have migraine without the pain?

My name is Jen, I’ve recently been DX, with migraine variant, I don’t have the head pain, and instead it's vertigo.
I have rocking type balance issues 24/7
I'm sending you this site; it explains a lot about migraine aura and the strange things associated with aura, body distortion, ect
Hope it helps.
It's natural to feel a little crazy when all this stuff happens.
I DID!

http://www.migraine-aura.org/content/index_en.html