My Pace, My Space

It's a terrible weekend, at least for me.
Because of my carelessness, I made a mistake that I didn't check the mechanism exactly be taken now.
As a graduate student, I shouldn't make this mistake. 
When I was an assistant, I was taught to check each number such as GDP, CPI...
How can I make the same mistake again?
I hope my advisor will forgive me.
I  am usually too confident, and things are not always just the same as what I think.
I know I have to face the outcome; however, I am not brave enough to deal with it.
I pray that everything will gonna  be alright. 

I find that I sometimes murmur by English, I think that this change is good for me.