Why can't I stop cutting ?

I had a boyfriend a couple of months ago and he put me down calling me ugly and other things like that saying I was worthless . That's when my self esteem started to go down then I started to cut at first it was just shaving the skin off then they became deeper and deeper . The more they bleed the better I feel . I am currently seeing a psychiatrist who I have addressed this problem to several times . She said if I don't stop she is going to tell my mom even though my mom already knows . First question is who else will she tell besides my mom. I want to stop it just so damn hard I got 4 days before today then about five minutes ago I cut again . I want to stop it just so hard . Can they put me in a teenage mental hospital for this ?