Please help docs! Where can I get lidocaine/novacaine and do I need a perscription?

Why? Please re-post your question as to why you want\need it. Self treatment? Experiment? Other? Normally, you have to have a professional license in order to obtain these types of substances from medical\dental supply houses.
More. You need more that a prescription. You need a dental or medical degree and a license from your state to practice any of the healing arts. If you are in pain you probably have a roaring infection and need professional care now.