if people ask if it's contagious just say "oh i wouldn't be at school if it was"
Make sure you get your parents to email or call all of your teachers and school nurses to tell them about your problem, so whenever you have to go to the bathroom, your teachers will let you out. This will help.
Make sure all of your teachers, your principal, and the nurse, know of your condition. You should work something out where you don't get penalized for being late or missing school if you are sick.
If you are embarrassed to tell your friends, teachers or even the nurse about your disease, do what's comfortable for you. If you don't want to tell EVERYTHING to people, just tell some. Even just say that sometimes you get more tired than others. It's okay if you don't want to say too much, 'cause everyone feels that way. Just don't forget, you're not the only one who struggles through something, or has a secret!
Can't scribble notes as fast as you used to, thanks to low-energy or trouble focusing? Possible solutions might be tape recording the lectures, having a classmate takes notes for you, getting the teacher's lecture outline, or working from the teacher's presentation materials.
When timed tests are a problem, you and your teacher might explore other options such as untimed tests, take-home exams, or breaking the tests into smaller sections so they can be given separately.
As you'll probably find, school counselors do more than advise you on classes and college plans. They're trained to help students deal with problems and challenges of all kinds, and can often play peacemaker between you and your teachers or other students.
Be patient. Things won't go back to normal overnight. Don't push yourself to get caught up too quickly or to forget about the time you've been gone.
Get a letter from your doctor that explains each drug, dose, time it should be given, and potential side effects. If your medication schedule changes in any way, make sure the school has the updated info.
Work with the school staff to set up a system for getting medication that won't make you late for class or draw too much attention. For example, you can be appointed hall monitor for the time that you have to get meds, or the nurse can meet you somewhere between periods.