This is very good advice. I've suffered from depression, SA and I suspect GAD, during all my time at university.
The disability service could have really helped me, for instance I'm too nervous to turn up to tutorials, where you have to work in groups. I skipped an entire module because it was group work based. And I'm generally always nervous or mortally worried about something.
I've got one year left on my degree now, and when the semester starts in September, I must talk to the disability office while its not too late.