It's just fabric. It can't think and you can. Go away from it for awhile. That might be a week or a couple of months. Think about how it could be changed and still be useful. Maybe you need to shop for some fabric (oh hurt me!) that you could work in to make it all come out looking fine. Or maybe just donate the pieces and parts to a thrift store and go start over on a different project. Whatever you decide, know that you can do things well, just one boo-boo isn't going to devastate you forever. I mean that in a kind way. Start looking for the positives. They're there. Honest!