Fear of failure

After feeling so good about my last drawing, the portrait of Grant, I find myself dragging my feet with my next drawing. I've chosen a picture of Aidan to do, which I think is really cute, and I've done the contours and started on one of his eyes, but for some reason, I'm afraid to continue. I've been dragging my feet with it, finding other things to do besides work on it, whereas with Grant's portrait, I couldn't wait to get to it to see how it would come out. I even bought nice paper to use with Aidan's portrait and everything. I realized this morning that I'm afraid to mess it up - I was so happy with Grant's portrait, I think subconsciously that I've convinced myself I can't top it. But I know I can. At this point, I've lost my drawing momentum and I need to just pick up the pencils again and continue. One of my goals for this week is to start it up again. Sigh...