Hello, @Derek1987.
I wanted to ask you if you got a diagnosis about the rocking-bobbing symptoms and if you're feeling better.
I have the exact same symptoms, rocking-bobbing-floating-swaying, 24/7, for more than a year, and I feel them violently when sitting and lying down.
I have to consciously subtly move my body and tighten my muscles 24/7 to somehow mask the inner motion feelings.
I also have POTS.
Seems like out symptoms are identical to MAV (Migraine Associated Vertigo) / VM (Vestibular Migraines) and/or to MDDS.
I have found this forum where there are a lot of people with similar symptoms.
https://mvertigo.org/