It sounds like you get this feeling when you are with other people (mostly). If that's the case I'd make sure I had some "down" time where I am alone, doing what I want. I'd start a walking or other exercise program to get rid of some of the edginess if I could and I would do without caffeine/soda/chocolate and learn how to do deep breathing. Maybe take a yoga or relaxation class? I'd do a lot of reading, listening to pleasant music.