What should I do about this?

I have all of the symptoms for insomnia, narcolepsy, RLS, circadian rhythms, and just about every night I have night terrors. I have the symptoms for schizophrenia, and have heard voices only two times, the first I couldnt make out, and the second I heard when I was in bed, it was demanding me to fall to sleep. I am often depressed, too. I am only 13 and my 14 year old cousin was diagnosed with schizophrenia just a month ago, and she has to stay at a christian camp until she is 18. My parents dont know I have it, and if they did I know that they would freak out. I want to tell them and I want to get treatment, what should I do about this?