Have any moms had to go back to work or school and are dealing with separation anxiety?

I’ve been back to school since baby was 2 weeks old, I am able to bring her to class. Yesterday I started my field experience for a week in the school. I’ve never left her for more than 2 hours and now I have to be away from her for 7 hours a day. I’ve been having major panic attacks and nightmares about someone taking her when I can’t get to her. I’m only there until Friday but I’m starting my second day in a few hours and have only gotten 4 hours of sleep since Sunday, and baby has been sleeping through the night. I know she is safe at home with my mom or her dad but if this keeps up I’m gonna be a wreck by Friday. Does anyone know any ways to help me cope?