"It feels cyclical, up and down and up and down, like the tides, only when I'm down it's like I don't want to do anything but lie in bed and sleep," I said, my eyes scanning the room, taking in the sun-bleached prints of pastel-colored seashells and bookshelves filled with titles like, Why Do Men Fall Asleep After Sex?   There was a snort from the graying man on the other side of the desk, Dr. H,…