I am on SSDI so you are doing better than me! I think it's all a matter of perspective. I have a friend who is a freelance writer. She also does a lot of community work, e.g., works in community gardens for no pay to help the local environment and keep the neighborhood presentable. I have a lot of respect for her. She also paints and draws - things I cannot do. In short, she has talents.

As a writer, you have a lot of options. There is your freelance work. But, you can also use your years of education to write books whether they be scholarly or not. You can write them at your own pace so that they hopefully do not cause your anxiety to flare up. Maybe you could start with short stories. Who knows? You might end up a published author! It may also be possible to contact your school and inquire if might complete your degree via correspondence. I think that would give you a sense of accomplishment and would be good for your confidence.