Can nurses use medicinal marijuana?

I was diagnosed with GAD (generalized anxiety disorder) about 3 years ago. I live in San Francisco, I was given a prescription for medical marijuana, and I must say it has help me a lot. I smoke at night, after work, and it puts me to sleep nicely. I'm thinking of becoming an RN but Im unsure about whether I can continue with my treatment if I choose this field. Does anyone have some factual information on this matter? Greatly appreciated.