I woke up at 4am last night with a full bladder, turned over, and discovered an alarming decoupling of gravity from rotational inertia. I lay there dripping with sweat for about 2 minutes, waiting for the world to stop spinning, which it didn't. I decided that needs must, and got halfway to the bathroom before the rushing sound kicked in. Made it to the loo, and somehow managed to drink three handfuls of water in an attempt to help the overwhelming nausea before everything went dark and sideways. I stumbled back to bed on the basis that was the best place to be with ropy blood pressure and a malfunctioning vestibular system, and promptly fell asleep. I woke when barakta (who had got up to ward off a UTI) came to bed some time (computer says ~20 minutes) later, complained that I was dizzy, and fell asleep again.
Feel okay this morning, just Too Hot and exhausted. Weird.