Turn Down the Voices in My Head

It's so frustrating.
Can someone tell me how to turn down these voices in my head?

The voices of 2 "person" talking, one is the "good" and the other is the "bad" one...
I really don't know what to do.
Plucking my ears with my earphones doesn't seem to work this time.
It drives me crazy soon! >o<

Please, I really don't wanna think about it. I just want to continue to be happy despite what happened. Please stop fighting over this small matter.  >o<