sewing machine broken... again

So it appears that either my sewing machine wasn't properly repaired when I took it in a few weeks ago or there is something else wrong with it. It skips stitches when free-motion quilting, and the needle occasionally hits something metal that definitely shouldn't be there. Luckily the shop that repaired it last time guarantees their repairs for 60 days, so I'm covered. It's super frustrating to be without my beloved machine, though - especially because I was part-way through quilting the black and yellow baby quilt!