I am new to sewing and to quilting. I finished my top, layered it with batting and the backing to machine quilt. However no matter what type of thread I used, it would wind around my bobbin and jam the sewing machine. The bottom of my quilt has large loops of multiple layers of thread rather than just the bobbin thread. What is jamming it and how do I fix it? It is a fairly new Brother machine and I have tried everything from tension to feed feet changes but it still jams and I have to cut the thread from underneth to get the mnaterial loosened from the feed feet. It will sew for about 4-5 stitches then jam. I am at my wits end and just want to quit!