As a writer there are so very many mistakes you can make, sometimes you don’t even realize them until after the fact, but without fail every time you discover you’ve done it there is that moment where you want to hide under a rock and beg your writer friends to just kill you then and there because you might never recover from the shame.
(Trust me, you will. We all make mistakes and that’s part of learning.)
I’ve made many in my time.
I’ve forgotten to attach stories.
I’ve sent stories to the wrong markets.
I’ve queried a novel LONG before either it, or I, was ready. (I feel a lot of sympathy for those poor agents who had to read my submission).
Most memorably, I managed to somehow rename my assignment as my novella and submitted that instead of the novella I’d spent months working on for that particular market… The only silver lining was that I ALSO managed to submit my assignment to my lecturer, and I got an excellent grade on it*.
The thing is that all of these things are surmountable. You can make mistakes, as long as you work to fix those errors – find a better way of tracking your submissions, of organizing all your pieces, triple check what you are sending against what is required. Despite this, you can still make mistakes because we all have bad days, but you want to do the best you can as much as possible.
Many markets are actually pretty forgiving (the time I forgot to attach a story, they let me know and I was able to send it in), and I think most places can tell the difference between when you’ve simply missed something in the guidelines and when you’re blatantly disregarding them.
We’re all only human right?
Get out from under that rock, tell your friends to console you, not kill you, and then get back to work.
*I’ve made a deal with myself never to go in for deadlines that occur at similar dates as assignments to prevent that from happening again!