How to bring out of arts school?

i've been sick for more or less 4 days now and it started out as stomach virus later i got a really fruitless cold now i own pink eye and a little bit of the flu. im supposed to be in motion to school tomorow, but my mom have a hard time believing if im really sick or im fake, if im really not feeling in good health, how do i stay out of school if she dosent believe me?
I also hold practice, how can i get out of that? If you in truth are sick just give an account your mom you feel sick. And if you hold pink eye you definitely shouldn't be within school unless you've be on medication for 24 hours because it's really contagious. Just tell your mom you discern seriously ill and your not lying.
Just don't shift.