Should I get Varivax / varicella ( chicken pox) vaccine?

In a regular blood test following a physical, my doctor told me I need to get chicken pox vaccine. I am 35 and had chicken pox when I was 7 or 8. My recent blood test apparently showed low levels of antibody to VZV (I think it was 0.9) - so my doc said I needed the vaccine. My doc does not keep the vaccine so gave me a Rx for it to take to the pharmacy, but they said they can not get it. So 1) should I get the vaccine and 2) how do I get it?