That's pretty much a snapshot of the 10 years prior to my SA diagnosis. I know a number of people (myself included) that are diagnosed but not committed. Trust me, you will thank yourself for the appointment later.
I was terrified before I went, for the exact same reasons you were. Heck, I held off mentioning the voices for months for fear of being committed. I'm glad I decided to say something, in the end. Good luck. ^_^