If you have a chronic illness and there is a very real possibility that something may happen in the middle of the classroom, you may want to have a private conversation with your professors.
Why would you want to do this? You want the professor to have a plan just in case something happens. You can tell him or her of what needs to be done should the unexpected happen in the classroom. You can also potentially avoid an unnecessary trip to the Emergency Room. It may also give the professor a little more sense of control if they have a plan ready beforehand.
This is up to you and how comfortable you feel with your health condition. If your health condition is very stable, then you may not feel that this is necessary.