3.year old refuses nurser and hates it

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We have veeb trying to go since she was 3. I was allowed to stay with her the slowly leave however the ladt few times shes a mess so upset about ne leaving her, she will miss me. The last time the staff tried to take her and.she broke.down they said shes to traumatised now. Im not sure what to do. Breaks my heart her that upaet but i know i need to do something as she starts school next.year