I don't in the slightest think you should feel guilty - it's part of your journey after all, and I don't think a persons blog should feel restricted to them.
I too have had times where I've thought - maybe that will come back to haunt me - not because I feel guilty per-say - because I meant whatever I said, but that doesn't mean that I want to hurt a person either. And so I'm big enough - in that way, to admit that maybe putting it in a public place isn't the best idea - but I don't think it's the worst either.

I know it's hella frustrating to have such negativity and people around you that do not understand (and also refuse to try to understand I might add), it happens to me (aspie suffering from depression and all kinds of other bits and pieces) so much that there is a point where you simply have to draw the line, create some distance and have some damn peace.

Perhaps doing it on the internet wasn't the greatest of ideas but I have to say, it's not like you didn't tell her and just spewed it all into a blog. We all make mistakes, we all need to vent and if you admit that maybe it wasn't the best thing to do, to put it out there for all to see then you'll be fine.