Help and advice needed please

My daughter is 6 years old .. She has days where she is a happy peaceful de-stressed little girl and then she has days where she hates me , doesnt love me , doesnt want to be in the world !! She cries over any little thing, loves her only friend and boyfriend to the point of obsession, cries at school and isolates herself if she thinks her friend does not love her. She hates clothes, says they hurt her skin, she has to put lids , rubbers ect in her shoes and down her skirt to make her more comfortable.

She hates the letter p being said it makes her feel funny, she says having hair brushed and put up in a pony tail hurts(to the point of screaming on the floor repeatedly taking it out). Water irritates her feet , she has to blow dry her hands and feet every time she gets out of the bath. She hates the sound of eating!! When she is at school no one has noticed anything but my daughter says she can just about hide her discomfort at school for eg pinching herself to stop her screaming???????? I think my daughter feels like she can release her emotions and take them out on me.

My daughter is very distressed at times and repeatedly says she doesnt mean it , that she cant help !! once she even said she wished she was dead!! this is my little girl saying this!! I have been so worried and so confused to the point of near break down ... Does this sound like anyone else's child ???