I am so sorry for you. Yes, we all make stupid mistakes from time to time.
One of the "experts" I saw on Alex Anderson's old TV show had a bag under the table at a retreat where she was teaching. She had the bag filled with precut pieces for the project she was teaching. While they were gone at lunch, the cleaners tossed her bag. that's not nearly as serious as your difficulty, but you are certainly ot the only one.