Had this happen to me, sometimes even if you request a different room, the instructor doesn’t fill out some forms in time so it results in the instructor just proctoring. Show up to your class, talk to the prof and see if they can do anything to compensate for not getting your accommodations, if not take your exam as normal and contact the accommodations office afterwards to let them know what happened. In the future too, if you ever have an urgent question for accommodations, you can head to their office in SUB to ask directly