If i may ask, is your mother aware of the extreme behavior....? like drinking at school, in the morning, drunk driving? your despondency where you don't care about yourself?
you have 10 big red flags, you aren't functioning and you don't seem to be able to pull yourself out with the therapy you've been getting. Is it an insurance coverage issue? maybe you want to tell her everything you have been going through and she will see/understand your needs better to detox and get some 24/7 professional support.
you could ask your current therapist to speak to your parents too. you are asking for help for several weeks?