I am 25 yrs old and have been having bad joint pains, mood swings, anxiety, irregular periods. I've had gone to see a Endocrinolist and he said I was extremely deficient in d. I was wondering if any one has gotten the vitamin d shot, or if you had any suggestions or recommendations on dealing with this. Its been almost 3 months now, and I'm wondering how long it would take to stabilize the levels.