Having a negative mind isn't really a good sign..
Little by little it can lead to your own destruction until just then you'll realize it was too late to undo the damage that been done.... 

Like what elders would always said when I always makes mistakes..

'No matter what happens, even if you regret it, in the end your mistake can never be undo. My dear, life is hard there is lot of paths to walk on, all of them can lead you to somewhere you don't know.. but when you made a mistake.. don't just regret it and then doing it again. Learn from your mistakes or learn from the mistakes of others.'