Depending whether you exercise or not, this NYTimes Article could explain why you feel your life is in, or out of rhythm.
For anyone not used to exercising, It may be a daunting task to include it daily. However, with some creativity and planning, it's easy to fit it in. Perhaps the most important thing is to make it the priority. I've always observed, that an hour of exercise, gives back more that an hour of productivity.
How many days did you exercise this week?
Do you feel it was just about what you wanted?
If not... what can you do today, so that next week can free up some time for you?