I quilted a whole quilt, sewed the binding down to the back, and was going to do a decorative stitch on the front of the binding. Well, my machine was skipping stitches and just making a mess. Even tried a straight stitch after that, and it wouldn't sew at all, was like the bobbin was empty, but was full. Finally stated sewing a straight stitch, but then started skipping on it as well. I changed the needle, cleaned the machine, changed the bobbin, did everything, but it still is not working. Any ideas?