I'm going to change my pair the last second
Why wait until the last moment?
I had to at the last moment because I got new information.
It is okay to do things on impulse sometimes, just not all of the time. I am an impulse person too, so I understand.
Yeah, I didn't want to, but I have no choice.
It is ok to act on impulse at times. As long as you know that you cannot do it at all times, it is fine.