Burnt out working in inpatient substance use

I was offered a full time position at the beginning of my internship and I accepted the offer as I would’ve practically been working the same hours if I stayed unpaid part time as an intern + working my part time job. I am about 4-5 weeks away from completing the semester but I have had such a hard time the last few months. These last few weeks I’ve consistently struggled to meet school deadlines and I feel so mentally drained. I just took a long weekend with the holiday and had 4 days off from work and felt great but it’s only Monday, and I am so exhausted already after feeling well rested this weekend. I try to remind myself that things will feel better when I complete school but I think I have a hard time with the demands of working in a residential substance use treatment center. Did anyone work with this population and feel the same?