Yes! All the time and many things. All at once. And much looping, especially the music component(s). And sometimes it will get interrupted, then come back, like you describe, but often it just keeps running right alongside. For the longest time, I didn't realize that it wasn't like that for everyone.

I was recently thinking it would be interesting to record. Well, not record, as that is impossible (though would be fabulously simple!), but to take sample tracks and mix them in such a way to have an approximation of what it sounds like up there.

I don't consider this chaos/chatter to be racing thoughts. For me, those are racing. It's not that the format is that different, but it's literally speeded up, louder, and I'm more consciously aware of my inability to catch them. They're more suited to a visual perception -- like speeding objects being shot in every direction inside my head. Zipping past, colliding, interspersed with randomly disappearing altogether (like an overload short out). I can see these "bullets" more than the thoughts themselves. If that makes any sense.

You mention silent time. The closest I come is kind of like meditation(?) Like at night to try to sleep. Consciously blurring them. Trying to zone to a drone. (DIY white noise? Lol.) Usually repeatedly, to counter the auto-revert. Have you tried anything like that?