Daughter being bullied

My daughter just started pre k and is already being bullied. It hurts my heart because she has been so excited for school for a long time and now that it’s here she absolutely hates it. She’s 3 turning 4 in a couple of months so she has a hard time communicating with me what’s going on. I talked to the teacher about it but the teacher says she’s doing fine. My daughter told me someone knocked her over and she went to cry under a table then someone called her weird. She cries every morning because she says the kids are mean. Any advice?