Regrets

Sometimes, we look back and wish we did things differently
Sometimes, we do things we regret ever starting it
Sometimes, we say words we never really meant
Sometimes, we thought of things we wish never crossed our minds

I sound so serious. Actually not. The main point I actually wanted to convey was:

Sometimes, you wish you've never gobbled the enormous bowl of ice cream at midnight, a few days before Halloween and you need to fit into your costume.