Hi, I'm a 23 year old female, 4'5" and 118 lbs, very active and an overall health nut. I don't smoke, eat fast food or junk, and avoid caffeine like the plauge. In the past 6 months my blood pressure has leaned towards the lower hypertension range, but has never been any concern for me or my doctor. For the past week or so, however, I have felt "jittery", with an uncontrollable tremor in my hands and shoulders. After expressing my concerns to the pharmacist I work with, she made me sit for a few minutes, then took my blood pressure. It was 137/90 with a normal heart rate. Should this raise concern, and any shot in the dark as to what might be causing this?