That sounds a bit like my mixed state. I'm newly diagnosed an just beginning to stabilize.

When my mixed state started, I felt like there was a howler monkey in the back of my head screaming continuously. I don't think he ever stopped to breathe even. That's part of how my mixed felt.

Now after my meds are starting to stabilize me, he spends a fair amount of time picking his toenails and eating a banana. I think that's about normal for me. (the monkey is a metaphor. I know he's not really in there, it's a way I think about it, kind of separates the "ill" from "me."