Leaving baby

Starting August I have to go back to school. It's only for 4 hours (8am-12pm). My EBF baby will not take a bottle for anything. We've been trying for a month now. We don't have much longer to try to get her to take one. There's a possibility my teacher will let me do my work from home since it's all online. But if she doesn't I don't know what I'll do. I'll be so worried about my baby the whole time. She's a big mom baby. She doesn't let other people hold her for long. Im scared shell spend the whole time I'm gone crying.