I always make do with whatever I end up with. I've had a couple of quilts that I've had that happen to. I restitch the seam using a very short stitch length, it's a number 1 on my machine. Then I sew a second seam using a very short stitch length right next to the first one just a milimeter away from the first seam on the raw edge side. If the fabric is thin and tends to ravel, I also make sure that the quilting stitches that seam down well too so that it takes the stress. I've dabbed on a little Fray Check, but I have to be careful to just let touch the seam allowance. Otherwise, it'l make a spot on your quilt, so I don't do that anymore.