bad memories

Do you have any bad memories? You want to delete it, but it got stuck on your mind so you never forget your bad memories.
And what did you do then? Trying to delete it or always thinking of it all the time?

I have a bad memories.
It happened when i failed the exams. National examination.
I was so shocked when i know i had a bad score of it, and always feel guilty. I always blame on myself and asked the same question repeatedly.

"Why did i was so stupid?"
"Why did i fail the exam?"
"This is unfair!"

That's just example. Other example is, when i had a big problem. I told my self it was not reality, it was just a dream and i will wake up immediately.
But no, it was reality, and i must face it by myself.

I felt so scared to face it alone. I was hiding and always think negative about my problem.
And all of the negative thinking that i thought became real!

After that, i believe in the power of mind.

I think it's a bad memories. How can you just hiding and hope your problem solved out?
So, from now on, I always think positive and see my problem from many points of view.

So people, how is your bad memories?