Frustration

I've been working on a shawl for my "Knitting 19th-Century Novels" group on Ravelry, the Swallowtail Shawl. I'm in the midst of the edging and I keep stuffing it up. I started tinking back to where I went wrong and now I'm dropping stitches in a lace border.

If this goes on I will either scream or use some scissors, I swear it...