chest pain, eating disorder

I am 16F, 5'4", and 120ish lbs. ive been struggling w bulimia since early october of 2025. i used to purge everyday like 5 times a day, then i got it down to 1 in november, i went 2 weeks without doing it in january, and now im doing it again like 3 times a day. im scared to tell my parents because theyre part of the problem. if i tell a counselor or teacher, theyll be required to tell my parents. my chest hurts and im scared about my dental health. i dont know what to do i hate it but i cant stop :( please help