It sounds like you might be experiencing the depression that frequently follows a manic episode. It can feel almost paralyzing. I think you need close psych follow up because just the lithium doesn’t seem to be enough. Any money you spend on psych care is an investment. If you can get in some meds that help you dig out of this, you will be in a better position to get your life back on track. Just my take. Good luck, I know how hard it can be.