We all say the wrong thing at the wrong time sometimes. And lord knows that when I am tired I am known to have worse judgement and foggy brain. Don't beat yourself up if you can help it, Sisabel. Maybe you can say something to your supervisor like "Oh man, I was so tired and overwhelmed, and said the wrong thing at the wrong time in that meeting!" If you don't have a way to express your concerns at work, or aren't able to say anything, I just hope you know you're not stupid. It happens to the best of us.