I would wait until the afternoon, or whenever you get off work to change it up.
The thing is, someone has to change up their schedule, or drop something for a different core/lab/tutorial to be available (assumption is that the course is full). So, I wouldn't wake up super early just to change it. There's tones of time to change things up.
Don't stress this out too much. See your Mac made schedule, and see if there is something you want to change. If not, you won't have to worry.