Jules- You make a valid point. Therefore, I take back that question.

Working and going to school is hard. I took worked many hours while I was in college. In fact once clinicals started, I rarely slept and/or ate. But, I needed the money and it is just what I had to do.
I do want to add that you would not only lose that income if you completely quit but the work credits you may need if you apply for SSDI in the future. So, I don't think quitting, unless you find another job, would be a good idea.