What is wrong with my sewing machine?

Oh, that's sooo frustrating. It almost looks like your bobbin is wound to loosely. Take the bobbin out and make sure it's tight, and not near the end. Then take as much of the bobbin casing apart as you can, and clean/dust it. Take your spool of thread off of the machine and rethread the machine from scratch. If that doesn't work, you may want to play with the tension, stitch length and stitch width. Good luck!  more