Abel, see my post about Ambien in the forum about Sleep Apnea and Sleep Disorders, about half way down the page "Ambien Tips & Tricks". Main point is that the stomach should be empty when you take it, because food / sugar / alcohol will make Ambien absorb too slowly to work. Might be the same for other meds like your Lunesta.

Try eating nothing for 4-6 hours before bedtime. I only allow myself to sip a little milk so my tummy doesn't gnaw at me. It sucks having to go to bed hungry, but getting to sleep is such a relief! If my tummy is totally empty, I'm conked out in 15 mins. If I have eaten more than a couple bites of anything, it can take an hour or more and have to take another one.

I hope this trick works for you. I have the same awful insomnia problem that I rarely feel sleepy (but tired a lot of the time) and nothing works for me. Ambien was a godsend 15 years ago and still is to this day for me. Do check out that post I mentioned in the other forum so you know how to keep from developing too much tolerance, too.