Oh yes, been there, done that!!! I was trying to finish a quilt before Christmas a couple years ago, and had a pretty bad cold so I was in a little bit of a daze. But I HAD to finish this quilt. I sewed the borders on backwards, the exact same way TWICE (backwards as in putting the seam on the face of the quilt rather than the back).
That's when I finally realized that sometimes waiting to do something saves more time than just going forward anyway when your brain is in a fog!