Going to the doctor to ask for a more effective sleeping medication, advice?

I've been taking clonazapam 1 mg - 2 mg for the last 8 months and I just don't find that it's working for me anymore. I'm guessing it's a tolerance, but recently my lack of sleep has been getting worse and worse and to the point where I'm laying in bed awake for 6+ hours and having horrible thoughts. At this point I'm not very concerned about the addictive tendency because I've had sleeping problems all my life and I need this fixed. I've tried so many natural ways and it just doesn't help, I'm severely depressed and have post traumatic stress disorder. Can anyone suggest a medication I could ask my doctor about that would be effective in, pardon my french, knocking me the eff out? Thanks in advance.