What do you do when all self esteem is gone?

You know what is great about mania? The fact that you think you are King of the WORLD. I have never had as much self esteem as I did during the Karama Sale that I hosted. 3 days before I was hospitalized I was throwing a yard sale for charity that raised over $600. It was an amazing feeling. But it wasn't really me. It was Manic Daria. Which means that all the happiness, self confidence and joy is gone again. Like right now I am working on a project at work. I just can not for the life of me "get it". I can't figure out the test cases. I can't get the simple load to work correctly and the developer doesn't have the time to hold my hand (this dude is so good he is pulled in 8 different directions.) I am working on 1 project. That is all they are asking of me and I can't do it. I feel horrible.