If you could undo anything from your past, what would it be?

Honestly? I would not marry my ex husband.
Or, at least, I would put his parents in their place from the beginning.

I would have quit smoking that time when i stopped for a few days back in the 90's.

I would have stopped the idea “it’s too late to change too late to enjoy life” attitude I had when I was like 14 years old an idea I kept until a few years ago.

I'd not date my 1st ever bf. He was abusive and now I have trust issues and sometimes fearful when getting into new relationships

Id have not let my father destroy my self image...

I wish I could prevent my past self from treating somebody who cared about me like absolute garbage. I did so because I didn't think I deserved her as a friend and I wanted to push those close to me away. We're fine now but it's not like we hang out now. I miss her.

Don't even want to go onto that kettle!
Everything bad has some good in it.
And everything good has some bad.

Change one small thing and the butterfly affect takes over.

I'd be scared to change something, I've known bad, but I've known of worse.