Jan, I can't tell you how nice it was to read your posts.  I was close to tears reading them because you described everything I've been going through for years.  I'm so worried.  I was recently diagnosed with Vitamin D deficiency...I was at 9 on whatever the scale is.  Doctor prescribed 50,000 PER DAY for 3 months...then a re-check.  I'm concerned I'm taking too much.  I felt like a new woman at first, but when my menstrual cycle started I feel like everything flared up again.  All of the symptoms you've described, I have exactly.  I'm concerned about the eye blurriness.  But, I also had issues with facial skin becoming very transparent and sloughing off leaving bright red skin beneath.  That is all gone now thank God.  This started as a teen when I couldn't stay awake and had muscle weakness.  #1 diagnosis: Iron deficient anemia.  Then after I had my first child, #2 diagnosis/cause: Depression/Allergies/Heavy Menses.  At the age of 30, #3: Migraines/Fibromyalgia.  At the age of 33, they found Melanoma.  It was successfully treated, and I began my new life OUT OF THE SUN.  At age 34, my body slowly began to "fall apart".  Diagnosis #4: Narcolepsy, Cystic Ovaries. With an rx of Provigil, then Nuvigil, 200mg twice daily to keep me from being horizontal most of my day.  In October, #5: possible Myasthenia Gravis.  Finally, #6: Vitamin D Deficiency.  I'm so frustrated, and I feel awful at age 36. Any link to MS?