Evaluate the amount of caffeine that you are taking in on a daily basis. The best way to know what you are drinking is to keep a food journal for a week. Assess where your caffeine is coming from whether it is from soda, energy drinks, coffee and/or medications. Taking in too much caffeine can cause body jitters and restlessness. Many nutritional organizations and doctors believe that two to four cups of coffee is safe. However the sugar found in sodas, energy drinks and that is added to coffee can also cause sleep issues.
Obviously there is no way to cut out stress completely, so seek out ways to control your stress level. Accept help when it's offered, designate chores to others and/or research various stress management books that are available.
If you are taking any medications read the side effects that are disclosed. If you have any questions about the medication you can consult your pharmacist or doctor. Some medications contain caffeine such as: antidepressants; cold and flu medications that contain alcohol; pain relievers that contain caffeine (Midol, Excedrin); diuretics, corticosteroids, thyroid hormone, high blood pressure medications.