SLEEP SCHEDULE (help)

ok does anyone have any insane ideas to fix one's sleep schedule??? im talking ANYTHING

at this rate ive been waking up at 12 pm to go to class at 12:30 or skip my first class to sleep in until 1-1:30 pm cause i end up going to bed around 3 am or later, IT HAS GOTTEN OUT OF HAND OKAY

I am the worst morning person ever and it has continued to the point where i CANNOT get up in the morning sometimes, idk what to do im rlly sleepy, and i try to go to bed at a reasonable time but somehow i look at the clock and its already past 2 am !!!

any ideas?