The head grower of a very large scale operation near here said something I think is a bit uplifting to those of us who lose a 'chid here and there:
"I would consider myself and expert orchid grower not because I grow them better than anyone else, but because I have KILLED more orchids than anyone else."
You must lose some here and there to know what NOT to do in the future. It's a growing process. Don't feel bad. Keep trying!