Living with an addict father and a codependent mother is anxiety-producing! I agree with everyone here, and you ought to read the words of EnglishGarden until you have memorized them. Really, make a plan and get out of there ASAP. You deserve so much better.
I highly recommend attending NarAnon or AlAnon, getting a therapist (if your doctor is a psychiatrist you don't likely get the longer talk-therapy sessions), and finding ways to take care of yourself at all times.
It is more than toxic for you. It is essential to your entire future well-being that you devise and act on an exit plan.
Keep us posted. We care about your recovery.