To keep it simple...

In order to legally use marijuana in the state of California you need a doctor to write on paper he recommends the use of marijuana to treat your health conditions.

The easy way: Find a pot doctor that specializes in writing the recommendation, they usually cost about $150 for the visit, and typically that written recommendation lasts for a year. Renewal prices vary from place to place. You will need previous health records showing you do indeed have a condition that can be recommended for medical marijuana, (chronic pain is a legal condition). The best way is to have the records with you on hand, but depending on the doctor you go to they may be able to have them faxed over. You can find a list of these doctors here.

The cheap way: Get the doctor you currently have for your neck to write the recommendation for marijuana. I say cheap because I am assuming you have health insurance, so this visit would most likely be covered by your insurance company, however the other doctors I mentioned above, are not. If you can convince your doctor to write the recommendation, I'd say this is the best method, but many doctors know very little about medical marijuana or are ignorant and care more about federal laws than their patients health.

Under the law, no doctor can tell you where to get medical marijuana, it isn't prescribed. You take the written recommendation to a marijuana dispensary, they call and confirm your recommendation is valid, and you are good to go
You can find a list of dispensaries here

Here is Prop 215, anybody even thinking about medical marijuana should read it so they know the law as it is. (just remember, the federal government doesn't recognize marijuana legal for any reason). - in case you haven't been watching the news hehe :thumbsup:

What area of California are you in?