I think you need to calm down. Use your valium according to the prescription, but allow it to help you through this time of distress.
Do things to keep you busy - even stupid things like repetitive games on the computer - candy crush and farmville and stuff like that that you have to concentrate on, but allow you to keep on trying again.
Take care of yourself and try to relax just a little. I don't know what job you do, but you do not sound like you are in a state to be thinking about going to work. Perhaps your doctor could sign you off for a while - he knows you are waiting for an appointment with the psychologist - right? He will understand and it is reasonable to stay off for now. I expect the appointment is part of the problem - it has heightened your fears and the worry about sharing. But you will be fine, and you will tell nothing to the psychologist that he has not heard before. I hear that you don't want to stay at home in mental torment. Is there anybody that can be with you - if your husband will be at work, or do you have someone you could go and be with each day?
I do not think you are evil. I think you are in distress and your judgment is clouded. What would you say to me if I wrote your introduction post? Would you call me evil or think I deserved compassion and support?