yeah, the antipsychotics are kind of hard core. I take one of the newer ones that's non-sedating for severe Bipolar type I. I seriously would think twice (possibly 3 or 4 times) before taking something that heavy for insomnia (not that insomnia isn't a problem, its just that the antipsychotics can have major side effects).
My heart goes out to you. As part of my illness, I experience insomnia sometimes, and its terrible, and its very bad for you also. I've gotten a lot better by taking several grams of niacinamide (b3) and several grams of taurine. They're both kind of soothing/sedating, and they're inexpensive. Melatonin, especially with extra b6, has also proven beneficial to me in the past.
I hope you can find a solution that works for you. If the insomnia causes problems, you may want to consider a prescription medication. Ambien (now ambien cr) and lunesta are some of the more popular options, but the old school Valium-type drugs can still be used (Restoril, Ativan, Xanax), especially if its only an occasional problem. The cool thing about those drugs is that they relax your body while sedating you, so if you haven't slept in a while and you take a sufficient dose of one, you wake up feeling very refreshed. But don't take them all the time, or with alcohol.
Anyway, I'll pray for you...insomnia is terribly unpleasant, and I'm sorry you're going through it.