I was sewing along today, when all of the sudden my needle wouldn't go all the way down. If I use the hand wheel, it goes up and then come back down, but the needle is only just flush with the feed dogs. Also, my feed dogs are in the down position. If I flip the switch for feed dogs down, then back up, they don't move. They just stay down. Are these two related problems? What can I do to fix it?!!!