Somehow I doubt knowing what the worst thing I've done in this situation is going to help you, because I'm not sorry about it and there isn't any "recovering" to be done. Sometimes you just have to embrace the fact that something happened because everything about a situation was terrible and move on with your life.
I'm not going into detail about the worst thing that was done to me because that is something I'm going to be angry about for the rest of my life, thank you very much. There are some things that just aren't forgivable, and if you're asking this question because you're not sure that what you did can or will be forgiven, then really, that's up to whomever you screwed over. For what it's worth, I hope they rise to this incredibly obvious bait and absolve you if it matters so much to you, though.
[anon text forever]
I'm not going into detail about the worst thing that was done to me because that is something I'm going to be angry about for the rest of my life, thank you very much. There are some things that just aren't forgivable, and if you're asking this question because you're not sure that what you did can or will be forgiven, then really, that's up to whomever you screwed over. For what it's worth, I hope they rise to this incredibly obvious bait and absolve you if it matters so much to you, though.