Can you give any advice on an annoying college situation?

I am taking a calculus class online this summer through my college. I live four hours away from the college and am recovering from surgery. I had emailed the professor at the very beginning of the class explaining my circumstances. I have disability status at the school, so I am supposed to be able to receive accomodations if I need them for health reasons.
I found out a few days ago that I am supposed to be present on campus to take the midterm and the final exams. There was absolutely no indication, when I signed up for the class, that I wouldn’t be able to complete it in its entirity from home. I emailed my professor right away to tell him that it would be impossible for me to come to campus right now. He told me I would have to take the test in the fall, when I come back to school. Problem is, I don’t know if I’m going to be able to go back to school in the fall because I might not be fully healed by then. I might have to wait until the spring semester, and I can’t imagine I would be allowed to take the tests at that time. I asked if I could perhaps get someone at my local high school to proctor the exams. He said that would be fine, but when I called my high school, they were too busy and didn’t think they could help me. We then called the local library, and a librarian there said she could proctor. I then asked my professor if that would be permissible, and he sent back a very reluctant sounding email, saying that getting it proctored at the library was less than ideal, but that he would allow it for the midterm. The final, however, he says must be completed on campus.
I am extremely annoyed that they’re expecting me to come to campus for what’s supposed to be an online class. I am physically weak right now and simply cannot drive four hours just to take a test. I don’t know what to do, or what I can do, even. Any suggestions?