If you're depressed drinking and cutting there are deeper issues then disrespect going on you should be open and honest with your mom and tell her everything. You need counseling from a good therapist and not one that will just goes "uh huh, yes, tell me what you think?" You need one that will help you give you the tools to move through the trauma and deal with it so you can accomplish your potential in life and believe you me trauma does hold you back.