If the lithium was treating a bipolar disorder, it could be that you're beginning to tend toward the depressive side once more...much of what you mention are symptoms of depression. Another thing you may want to consider is your hormone levels. Check with your gynecologist. He/she should run some tests for thyroid function and basic female hormone levels.
Please do check with these professionals and not let your condition be allowed to worsten. You don't want to be facing a serious depression or be tolerating something that can be remedied with basic hormone therapy! Good Luck to you!
