Do you have a support base? (Family, friends, hotlines, etc.)
I've never had inpatient treatment, though many of those close to me (with other issues, usually bipolar or just major depressive) have, and I have heard many mixed reviews of the experience. Perhaps you could get a feel for the place before you go, or look at the facility before absolutely committing? I'm not sure exactly how immediately you feel you need this sort of intensive support, and don't wait if you feel you cannot. Just a suggestion. I hope you have some local support.