Great suggestions, I would also make sure you are getting enough sleep. If caffeine or other drugs are keeping you up, try and phase them out and see if you can go to sleep instead of staying awake worrying. You don't mention if there has been any changes in your life but it's normal to react to a significant change (e.g.death of a relative or close friend, end of a long term relationship, loss of job or other significant financial setback, etc..) with stress.