The Lunesta just may not have worked last night because you were wide awake from the 12 hours you slept the night before.

I wish that your pdoc had just prescribed you lithium in tablet form. That would have made life a lot easier…
I have always taken lithium carbonate, which comes in tablets, but it's possible that she chose to prescribe you the other form of prescription lithium (which I can never remember) for a particular reason, and it only comes in capsules.

I hope you do well with it