Daughter refuse to pee in school.

I need help. My daughter is 3. She was full potty trained at 1. She has gone by herself since almost 3 months ago she doesn't need me anymore to pull down her pants/panties and she know how to wipe herself.The only problem is that all that knowledge seems to disappear once she's at school. She says that the restroom is scary that is too big etc. The toilets there are the same size as the one at home.I already talk to her about it, I told her it's perfectly fine to go, I already went to the school restroom with her and made her pee with no problem, she even said that she wasn't scared anymore... But 2 weeks later and the teacher call me to informed me my daughter pee herself. I don't know what else to do. I want to cry because at home she is so goddamn independent even when we are outside the house she's like "BRB I'm going to pee" :(Help me parents. via /r/Parenting http://ift.tt/2fb5m99