Hi Judy,
I had my vitamin D levels tested 2 months after I was diagnosed and my level was at 17. I took the 50,000 IUs prescription pills for 9 weeks. It then got up into the 30's. For awhile I was taking 1,000 a day after that but I have to confess that I've been lax about taking it in the past few months.
I'm going to ask my neuro next week if she can test my levels again. I will tell you that I lived in San Diego (LOTS of sun) for 8 years and have been in a very sunny part of Texas for 4 years and I was still deficient! So even the sun didn't seem to help my level. I agree with others -- you should take prescription for a BIG boost to get started.
I'm sure you know that deficiency of Vitamin D can cause weakness, fatigue, muscle aches/pains as well as immune issues.
Here are some useful websites. Good luck getting your level up!
http://www.womentowomen.com/nutritio.../vitamind.aspx
http://www.vitamindcouncil.org/
Natalie