Two stories provide an unfortunate reminder that lawyers (and law students) may have a higher-than-average instance of substance abuse. One story frames the fears of a new, drug-addicted attorney who doesn't know how to tell his firm he needs to go to rehab. The other is the incredibly moving story of an attorney's recovery and reinstatement to the practice of law following disbarment.
Paired together, the narrative for law students is that if you have a substance abuse problem (or frankly a mental health issue or other troubles), getting help doesn't have to mean the end of your career.
Ohio has an excellent Lawyers Assistance Program and Moritz provides links to a variety of resources that may help you get back on track.