mistake

i had make a big mistake yesterday.. i sent the wrong document to my lecturer.
This document is called witness statement. I do not know why i am so careless..
besides, we(cos this is a group document but is I keep it).. .....there is some problems in this witness statement and we need to send to our lecturer to clarify it but i send it wrongly...but the important thing is i scared the lecturer will hav bad impression with us..
actually this is a long story and i am very sad about it cos involve a lot of things.. but i cannot explain here...