Living with Fibro

I had a great day yesterday, full of energy and was productive. I think, yeah, I can go back to work. I found the perfect job, so I think. As I get up this morning hurting and tired I realize that I was in a fantasy world. I can't go back. I need to work on my health and stop thinking I can return to work. Sometimes I feel holed up in my home. I don't want to leave and don't want to deal with people. Is this depression??