Sounds like you're doing good with the meds. What's PRN?
Sleeping medication sounds really good, if nothing else to help get you on a schedule. If you don't want to try it, there are other methods. For instance running or working out, or reading a book an hour before you want to sleep, watching T.V., something to play with. I've found the more I get on a schedule of sleeping at a certain time, the more likely I'll get tired at that time. And I had severe insomnia problems before and this still rings true to me. Though of course, with each person a new option is added: their experience on the subject.
For taking the new meds, of course the hubster is you're first line of defense. As an added line, write down reasons why you're fighting the good fight, reason to make you smile, all the things that help you power on. Write them on strips of paper, fold them up and put them in a jar. Do this everyday, be sure to add new things you think of! Whenever you feel overstressed, pull a piece out of the jar and read it...remember that is just one reason to keep fighting. Ooo, writing on the jar something like, "things worth fighting for" could help too. Just an idea though, feel free to add on.