After the usual handsprings and wooohooooooo action, I had the "I'm supposed to be somewhere doing something" feeling for several months, up to almost a year. It was a residual of living a tightly scheduled daytime regimen for almost 2 decades. So I countacted that type A behavior by entering "appointments" in my email calendar, ranging from "Feed the fish" to real appts like doctor checkups or call so-and-so to go to lunch. Some of my entries were actually pretty funny.
Are you winter bound or living in nice weather? Your feeling could simply be mild cabin fever. I know I'm getting a little antsy for spring.
Update - I just saw your intro post. A bleated welcome to the board, Mr. or Ms. Physicist, from a retired Ms. Engineer. I'm not quite getting the symbols in your username yet. Give me some time to figure that one out...