The "unrestful" part, I am familiar with it from my chess dreams. Sometime I would dream of a position on a chessboard and of course have to think about what the best move is. Threads are everywhere. It takes time to figure out the move. When I finally have the move, the board grows and suddenly there might be a bishop somewhere far away on that grown board destroying all my "best move" plans. The cycle starts anew.
After such a dream, when I wake up, I really feel like "damn, I should have found the best move and shown them!" but also like my brain is burned out from thinking so much and visualizing so much in my mind. Not restful.
But fortunately I have better dreams as well and sometimes, when I feel lonely, my brain turns on self-healing mode or something and I dream of someone I love. I will gladly take all the exhausting dreams, to keep the good ones.