oh and antidepressants - I was on those. They have found that they can help recovering anorexics , as starvation leads to a form of psychosis( but temporary). So they can be of use but I find HATHA YOGA very very good.
You can get these taught at YMCA or comm. college.Self harm is a emotional condition. I took care of a good friend for many years with body dismorphia/ Borderline personality dis. so saw it at close hand ,while helping her.
Hatha yoga was invented to specifically CALM and tone the emotions. I use it to good end( but could do more)as do many of friends.
Maybe when you are feeling harmful, you can put on a DVD( do you have a dvd palyer?) and watch the Tour de France or something, and stretch.A intro to hatha is good too.Its is soo good for riding( just ask Cadel Evans!!) and helps you not age as fast.

Also I would start taking APPLE CIDER VINEGAR( everyone should) to stop acidosis. This is caused by eating sugar, meat, soy, dairy,coffee, tea, soda, alcohol and acid food. It make your hair and nails brittle and contributes to oesto as body takes calcium from blood, which get sit from bones to balance out. Some organic apple cider vin, with the vinegar mother ( I love that! ) the essence of the vinegar , is best. tastes yummy on salad too.I take shots of it, with honey with my calcium tablets in morning.
im going to read those storys of chick riders,who recovered. I find that so exciting.I wasnt sure that you could win after such stress but hey! cool!