During your disability exam use this week to show why you need disability. Talk about how difficult it has been to have 3 appointments in this week and that 2 were just an hour with providers you know and are comfortable with. If you can't handle 3 appointments a job would be pretty hard. They need to hear about every possible difficulty that you can describe and you have a great example in this week.

Also I agree with Bioche , don't take valium before that exam. Let them see the real you. The discomfort is not for long and you can take one as soon as you are done.