Suzzane, hopefully you know you're not alone. We all have that feeling sometime. What I do when I'm feeling down, is go for a run. What makes running such a potent cerebral enhancer is its ability to spark neurogenesis: the growth of new brain cells. How it does this is still a mystery. It could be because exercise induces increased blood flow, or limits the production of stress hormones like cortisol, or some combination of reasons. However it happens, running could be a better antidepressant than anything you'll get from a pharmacist. Depression is linked to reduced neurogenesis, and it's possible that SSRI drugs like Prozac encourage the growth of new brain cells. Recent research on running indicates that it does the same thing, but on an even larger scale and without the infamous side-effects of the drugs.
Just remember, you are beautiful. Maybe go for a mani/pedi tomorrow. Or get your hair done. Or a massage.