Hi, may I answer your health queries right now ? Please type your query here... I have been getting dizzy spells and have been off balance and have felt weaker and more tired lately. I went to the doctot over a week ago, got a blood test, turns out I had a vitamin D level of 17. I have been on 50,000UI of vitamin d a week for 2 weeks now. I haven't had a real bad dizzy fit since last friday (the 8th) But I do constantly get head rushes almost every day from walking around, turning, or looking up or down. How long should I give the vitamin D before I go back to the doctor? I've been taking it for 2 weeks now. I'm also in a "just woke up from a deep sleep" quite a bit. If it is just a vitamin D difficiency, how long should it take before these dizzy spells stop?