I think you should call your pdoc and let him know what is going on. You can tell him that you aren't comfortable going into details over the phone, but that you need help making a plan to keep you stable until you see him on Friday. My guess would be that he would not want you to totally open yourself up to him over the phone but instead help you with coping until you are in session again and can work on it in person. Remember that you have control over what you talk about even on the phone. Your pdoc told you to call him if you needed to, I doubt you would be the first person to call and say I'm having a hard time and need help, but I don't know exactly what I need.

Take care of yourself!