Why do I hate the sound of laughter?

Every time I hear someone laughing I don't know why but I just get so angry and upset. I feel like I want to hurt the person who's laughing. It's so distracting whenever I'm trying to do something. It also isn't fair why other people can laugh and be happy while I sit and be miserable. I never used to feel this way oh and I never laugh anymore either. So is there something wrong with me. Should I get help, what are your guy's opinions.
Why do I hate the sound of laughter?
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