Artistic Depression

Do you get depressed sometimes because you cannot seem to create anything? Does your emotion of the day and feeling rest on whether or not you can get something out of your head to manifest into a painting or piece of work? I seem to slip into a funk really fast when I cannot create my work. Lately I have not been happy with my results of what I create. It seems to snowball from there. The days go by really fast. I do not create anything from which I thought of. I look at images for inspiration and use reference as my subject rather than create something from my soul. I feel fake and do not feel worthy of people looking at my art because of the fear that they will see right through me.