Maybe you could start by discussing your stated insecurities about class and status and verbalizing your fears that T won't be able to "get" you because of the described differences. Once that is out of the way, you may feel better able to get to the crux of the issues you need to discuss. Please don't let concern of T's inability to understand completely to bar you from doing the necessary work that you need to do. There must be innumerable clients with a multitude of issues that good therapists are not able to identify with, but they are able to help these clients despite this. Hugs for you - from one who CAN identify!