After taking doctor prescribed vitamin D2 at 50,000 IU for 10 weeks and 3 weeks off of it per doctor order to get a reliable reading, my results from a blood test done on 5/17/12 show I'm only at 34ng. The doctor only recommended 2,000 IU a day from here on out. Based on what I've read on this board and many others, that is a low maintenance dose for someone who is at an adequate vitamin D level of say 60-80. I tried 10,000 IU of vitamin D3 a day with food for a week but gave up due to stomach upset after each dose. I'm thinking of trying liquid D3 at 5,000 IU a day. Any suggestions on how to proceed with recovery? I still have all the same miserable symptoms. The worst being the flu like sick feeling, brain fog, EXTREME fatigue, ringing in ears, dizzy, lightheaded, tingling hands and feet, burning sensation on hands,forearms, feet and calves.This doctor claims my blood results only show a vitamin D deficiency. B12 and ferritin were tested on 5/17/12 as well but apparently came back within this doctor's guidelines. The severe symptoms started on 6/07/11 so about 6 months of this. Thank you to anyone who takes the time to respond. It is appreciated.