Are there make up exams for AP? What allows one to make it up?

I’m taking an AP Exam next week, but I have unpredictable migraine attacks. I’m afraid I’ll get one during the test, and I won’t be able to take it (my attacks are very violent and disables me to do anything but sleep).
I don’t have a 504 plan yet - I’m working on it. Will I still be eligible to make it up?

Thanks.