I too have suffered from "block". All of the suggestions above sound like good advice. Worrying about it will make it worse. Maybe you need to take a break, start taking walks around the neighborhood, knitting, time with friends, pick up a project you never had time for while quilting. My block ended while doing a major clean out of the sewing room. When you look at quilting as a "should" and not a "want to" the seeds of block start to germinate.