Congratulations on finding the wind in your sails! I'm also of the artistic temperament and it certainly seems like you're using the spontaneous energy positively--stay in production mode for as long as you can / feels right. When/If it fades, don't be discouraged-it's simply time to 'fill the well' as the phrase goes in The Artist's Way (Julie Cameron) which I'd highly recommend if ya haven't already read it. 'Filling the well' is the phrase she uses to describe what people do everytime they listen to new music, read new poetry, view new pieces. All good stuff and does seem to set off the productive modality in good order.

On feelings of depersonalization/disembodiment, even willfully kicking aside the real world, I can certainly identify: 'I am in this room, but this room is somehow nothing, yet I am a something, yet the something that I am is still not the me that produces the thought.' & so on. It's kinda like a thought-experiment in philosophy gone wrong. . .

As an aside, I'd read in Psychology Today last week that something very interesting happens to the brains of musicians which does not happen to the brains of nonmusicians. Here was the experiment: an fMRI scan was performed on these two groups which revealed that musicians (and not non-musicians) could and did actively suppress activity in an area of the brain that's usually associated with sequencing incoming stimuli while improvising melodies on a little keyboard. While that's likely not specifically relevant, it does seem to provoke the question of whether a similar process may happen to visual cortex/proprioception in some other folks visually inclined... who knows, just a thought.

Back to the problem of altered consciousness--those times when the world had seemed to go all perpendicular, and not itself, I found the following useful:

Glass of water + yoga--sounds silly, but no joke. I'm not particularly spiritual, but increased circulation and deep breathing will certainly change the state, if not alleviate some of the discomfort, physical and cognitive.

And as far as I'm concerned, if I take your meaning of 'reality' correctly, it's perfectly cool/understandable/rational to shut the door on it for privacy, reflection, rest, creativity. Reality is nothing if not persistent, and it'll be there when you open the door.

Hope that's helpful.

Take care, & Happy artmaking!