Don't worry - I was afraid I was being sent for a mental eval because they thought I was a fraud or faking my problems. My attorney's staff put the fear to rest - they said when people are disabled it is stressful and common for them to develop depression (or in your case, anxiety) and for this to affect their ability to function well.

If they find co-existing conditions that limit your ability to cope or function day to day, that will not hurt your case.