I bought a kit from Keepsake Quilting for the Labyrinth quilt. This is the first big quilt that I've made in years, and I wanted the colors to be good together, so I chose a kit. Since some of the colors are dark, I prewashed all of them before I started cutting it out. Well, here's my problem that I woke up to at 4:30 this morning... I DIDN'T wash my muslin backing. I bought the good quality muslin, but in my effort to hurry up and get started, I completely didn't think about washing it. Will the back shrink now when I wash it? I hand quilt and have completely gotten the big medallion/star done and am moving right along... now I wonder what I should do. Any help would be appreciated.