behind her back is exactly were Columbine hearing is at its best

Stay away from Columbine, they said. She's no good.
Vicious Columbine, they would whisper behind her back, day after day after day after day until it became all day long. Suddenly they were just faceless voices who plagued her every thought. Suddenly she can't sleep at night, she doesn't wanna wake at all.

Sadly, she thinks, the doctor says is not terminal and not curable.
The doctor also says is all in her head and she knows is in her head, she can hear it, you don't need a PhD to tell that. He says the only way to deal with this would be pills.

Here the funny thing about pills: they didn't solve Columbine's problems. The pills shushed the voices in her head, but they didn't make people any less mean.