Nothing to fear, my dear. Easy said, yes; but true also. Doctors are professionals, they don't really "understand" patients unless they've been through the same thing themselves. It isn't really their job; they just diagnose. Trust me when I say the doctor/clinician will not judge you in any fashion, they just want to help.
But I too was worried when I first saw someone about my "weirdness", as I called it. I was afraid they were going to say I was just crazy! But, after proper diagnosis and the beginning of a continuing program of support, I felt great about turning up because they were there to help me.
I hope you will feel the same about your clinician's support when it gets rolling. Just remember to hold nothing back due to fear. Doing this will make it difficult for the other person to help you. Best of wishes.