Deep breaths, Wolfie, there's no point worrying over all this until you've actually met with your gender clinician, as no one here has any idea what to expect. However, if they're constantly working with trans patients, they (and you) should know that there's no such thing as "not trans enough," so if they shoot you down with that label, just find another specialist ASAP. Maybe, if possible, you could ask your parents to see a gender therapist with you, so you have someone that can act as an advocate for your cause and maybe sway your parents a little.
Just keep yourself as happy and healthy as possible, it'll all work out. 🙂