Please get tested before using Vit. D. It is a fat soluble vitamin which means it is stored in your fat. Its dangerous to take to much of it. get tested and then after 6 weeks of taking D get tested again. You should be working with a doctor if you need to take Vit. D.
I take 1000mg. twice a day but my levels are quite low. I tried the prescription 50000 mg but it gave me headaches. It is believed that low D may cause muscle aches and pain and possibly is responsible for some cases of fibromylagia.