I'm so sorry for you. I have one other option - I just recently had to do this on one of my quilts. I was using my embroidery machine to do a design on a square and the machine jammed and messed up my embroidery. The stitching is so small and tight that there was no way I could unstitch it. I tried! I ended up cutting out the square (thankfully, mine was at the edge), redoing the square and sewing it back in. Yes, it was a HUGE pain in the behind to do this, but once it was all finished, the only place you could tell that it had been taken apart was in the back because you could see the joining of the square.
Good luck