Hello Skye,
This hit me pretty hard when you said:
"How do I break this cycle? I want to be well. I know what I need to do to be well. But I just can’t seem to do it. How do I make myself do it? How do you make yourself"?
I sympathize with you as I often feel like this. I know what I must do, and how to do it. But much like yourself, I cannot seem to bring myself to do it. I don't have an answer...but know, with that thought, you are certainly not alone in that line of thinking.
As for the medication...Dexter seemed to have some good advice on that. I myself, went through a period of trying to be on a prescription, then trying it without, then I'm back on. I hate pills...and I take medication for other health troubles as well...but as annoying as I find them, I try to tell myself that if it helps, it is worth the discomfort.
Now I have no experience with lithium, but if it really helped you, I would try Dexter's advice and see your GP for something about the nausea. Good luck and keep us posted.