I absolve you of all forgiveness. Or whatever.
If I were a betting man, and I am, I'd bet the film is toast because it is slide film. I love to shoot B&W film, especially Tri-X, because it is very forgiving (there's that word again) and can tolerate a 3 stop error if you know how to develop it. Won't be perfect, but it won't be a write off either. My experience w/ slide film has clearly not been the same. Color negative film has a wide exposure latitude too.
Hey, it just gives you a good reason to somehow go back and reshoot the images. At the least it was a hard won lesson, and those are the ones that you remember. Mistakes are part of the deal. The only way anyone gets experience is by doing what you're not supposed to do. That's what the word experience really means.