I physically cant wake up

so Im struggling to wake up. like I can literally sleep continuously for 17 hours and still feel tired. If someone doesnt wake me up God knows how long i might be able to sleep. But yeah basically the alarm in my body doesnt work and doesnt wake me up. and ive tried all sorts of alarms multiple alarms those task alarms where you have to do alarms all for nothing i either sleep through them or slep again and not remember. I can barely function. It has been like this for a year now i need help. like I cant wake up before 1pm ive tried everything to wake up early in the mornings. that too when someone wakes me up. so yeah basically my focus is gone and im so exhausted and it is getting me lower grades please help