I am a very active, healthy 65 year female. In Dec. 06 I noticed internal shaking in left arm and in my chest. Cardiac problems were negative. This sensation of internal tremors which cannot be felt by others or seen, plus pins and needles has now involved my whole body. When I am active in the day it is not as noticeable, but soon as I stop and rest I feel them. I don't tolerate heat well, My sleep is very disturbed. I have taken ambien 5mg prn for 8 years due to insomnia. My neurologist thinks it might be restless leg syndrome- even though tremors are located throughout my body (I'm waiting blood test results- thyroid and iron levels). I was put on an antidepressant (Celexa) and other meds are to be determined. Do you have any ideas?? Thank you.