question: 45, depression for about 20 years, take prozac 40 mg daily, overweight, i am about 5 7 208 lbs, exercise daily, walk about 1 mile, cutting back on calories, sweets and jumk. feeling foggy in the head, just not quite right, jittery, sometimes down right shaking and cold feeling, went to er , second time for this in 2 years, blood work shows ok for thyroid,blood glucose, heart ok, kidney functions ok, said i had a world class blood workup and nothing showed. gave me xanax to try, hard to function even on .5mg as it makes me very tired and I have to drive all day. very upsetting and has me rdgy nervous and worried now, sometimes symptoms wake me out of sleep, sometimes vomitting and dizziness, not sure if shortness of breath is anxiety from not feeling good or really am short of breath.