Why am I not studying

I am student and in class 12th rn and like tmr is maths exam and I didn't study so I am gonna stay all night to study BUT we literally got 9 days to study it's not about exam it's about me wasting my potential and at last doing think and screwing with sleep also my mental Health :( i just can't make myself to study when I have time and need to force to at least don't write empty paper and pass