I have to agree with kindachaotic - you're on a fairly low dose of Lamictal and that has been shown to help reduce the cycling and mood instability. And that seems like a high dose of Seroquel to take just for sleep, especially with the Halcion. Do you also take it for mania or psychosis? Don't mean to intrude, just trying to understand what your needs are.

So, I would try to exhaust the possibilities of what you're already on before adding anything else or taking any of them away. Also, all of your meds are available in generics, which helps keep the cost down. Many of the older drugs, though certainly effective for many people, have been phased out for various reasons. Too many side effects, for example, and the newer meds just seem to work better. But the problem with the really new meds can be the cost. So, yeah, I'd try to work with what you're already on.