Hi Carrie. I think Phoenix47 and Rebecca have it right. Although policies vary from country to country and here, state to state, I think in most cases your consultation with a school counselor should be protected by dr-patient privelege unless, as Rebecca mentioned they feel you're a danger to yourself or others.
They both suggested writing down your thoughts which I think is a fantastic idea. It's often a lot easier to write down our thoughts instead of having to think about it in the limited time we have available with counselors/therapists.
Good luck to you and I hope it gets a little brighter for you.
Chris