Having so many things that you want to do is a sign of mania. You don't sound full-blown manic, but maybe a bit hypomanic. It's something you could talk about at your appointment.

I hide sometimes too. When I was in college and I had awful roommates who were shunning me, I started hiding under the desk or in a closet. There were several reasons for doing that - like to show that they were treating me like I was subhuman and I didn't deserve to take up space, or to be near people at least since they stopped talking whenever I entered the room they were in. It was comforting to hide, and felt a little more secure. I still hide sometimes. My bathroom has a vanity counter, and I get under that in the little nook that creates underneath it. I have also had a compulsion to hide under a desk at work when I'm having a bad day or maybe overstimulated, or in a place where I feel anxious and uncomfortable. I try to resist hiding under desks in public these days.