You know, it is always great to set high standards for yourself in whatever you do but you have to be realistic in your expectations. If you are having all these symptoms and problems then you have set unrealistic standards for yourself. You are obviously very smart so sit down and think this through. Your body is telling you that it needs a break from all this anxiety and you need to do something about that. If you don't you will see a physical decline in your body that will take a long time to fix. You have 15 months to be ready for the test so take it easy, study a little then find something fun to do or a place to go to that will exercise your body and not just your mind. Find another interest or activity that you are passionate about and go do it. Relax!!!!!