What do I do help !!!

What do I do idk what else to think of! I’m stressed I’m lost. My 6 year old daughter won’t stop having accidents at school. Every week they call me she pees on herself I’ve done everything. I’ve already took her to the doctors her dad & I have talked to her. Idk what to do? How can I help her ? What can I do? No matter what I try it doesn’t work I’m overwhelmed 😖