I agree with Pauly, benzos mixed with alcohol is bad news. I used to be severely suicidal during my high school years, and a few years after. I've had so many attempts and near successes that I still think of it as an escape route at times, but the last time I put my head in a makeshift noose, I was under the influence of both benzos and alcohol.
Either one by itself is okay, sometimes I'm okay with both as well, but I think the combination magnifies negative thoughts and situations leading you to feel that life is unbearable. I'm surprised they didn't toss you into the psych ward when you were in the hospital. I think that would do you some good, actually. I've been committed 4 times, and I've always left better off. Consider checking yourself in, at least for the quick 72 hour watch (then you can sign yourself out if you choose). If it's a decent facility, you'll get your own psych who can prescribe you something that will work, and at the same time it'll prevent you from hurting yourself or overdosing on anything. Give it thought.