In order to get accommodations for mental health issues, you have to be diagnosed and in treatment with a mental health professional. That's how it works at Universities. And if your anxiety is that bad, you really need to be in treatment. If you want others to help you, you need to begin by helping yourself.

If you are unable to fulfill the requirements of the class (attending the class, fulfilling the assignments), then it would not be appropriate to give you a passing grade. You just might not be ready for college yet, until you can manage showing up for classes. Colleges are meant to prepare you for the workforce. If you didn't show up for your job, would you expect to be paid? Or would you expect to be fired? What if the company was counting on you to make a presentation for a client?

As someone who was registered with disability services in college (and is now a University professor), I can tell you that accommodations are intended help someone who is qualified for the class by making minor adjustments in order to accommodate the disability. For instance, someone with dyslexia might get 50% more time to take the test. But they don't get excused from the test or get an easier test. I had a student once who had a sleep disorder and was allowed 2 additional absences per semester-- but no more. At a certain point, the level of accommodation would not merit passing the class because the student would not have mastered the material or fulfilled the assignments. College is hard and it's a lot of work. If you aren't able to function well enough right now, then you should really do yourself the favor of getting help. I know you have anxiety about seeing a doctor, but that's the only way you're going to get better. If everyone with anxiety just stayed home and didn't get help, millions of people would be suffering needlessly. Anxiety is really common; I have it, too. Getting help and learning how to manage it-- with minor accommodation-- is the adult thing to do, to demonstrate you're really to go out in the world and earn a college degree and become self-sufficient.