Hi,and welcome from Oklahoma. I think this happens a lot to some of. Don't dispair! Stop and check the tension on the bobbin. If thats ok then check how its threaded. Sometimes if you are doing fmq you may want to drop the feed dogs a bit. I sure hope this helps. Remember the Log Cabin is a very old favorite for a special reason. Its so beautiful and there are no quilt police. Just do what you can and enjoy your lovely quilt. marvel