Hi, everyone. I have a Janome sewing machine. I was recently sewing denim that was too thick for the machine but I was forcing it. I really wanted to make a purse with denim. Well, now the machine doesn't sew correctly. The bobbin thread doesn't do anything. I've tried adjusting the tension to every setting. It doesn't make a difference. The bobbin thread is easily pulled out and my machine is now useless. Can someone help me to fix it? I can't afford to take it to a shop to get it fixed by a professional.