Is it normal to be afraid of the whispers?

Sometimes I'll just hear these whispers, they say things, and half the time I don't understand them, as in they're hard to make out clearly. But I never really know what they're saying because it's all in this really wierd dialect. They whisper, the kind of whisper that doesn't exactly sound friendly, and they'll do it randomly. I went two months without hearing from them, and I was glad because I thought they went away. And then later at school in the middle of English my head just started screaming. They were still whispering, but it was just like someone had turned the volume up to max. I couldn't hear my teacher, and at that moment I was thanking God I was in a corner, because no one saw me grab my head and lean my forhead against the table. It HURT, and it stayed that was for what seemed like forever, but it was probably only a five minuets. They stopped as suddenly as they came, but they started coming back again. I just want it to stop. I can only make out one word, it's not said very often, but when it comes up it sounds like hatred; my name. So now whenever I hear my name in reality I get all jumpy. I am terrified of these things. I just want them to go away. Is this normal?