Yup, I'd say go back to the basics. When I was about...11, that happened to me and I had trouble for a whole few months, I think. Not only would going back to the basics help, but I think looking through a few magazines and how-to-draw books gives some encouragement and ideas to get it flowing a bit more.
Yup! Here is safe. ^____^
We help eachother out, talk about comics, ideas, or drawings to share, and whatnot. XD