Breastfeeding and school

Hi ladies, I still have some time before this baby is born but I plan on exclusively breastfeeding. However this time I need to go back to school/nursing clinicals when the baby is about 8 to 10 weeks old. I didn't have to leave my other children' until they were much older so this would be new to me. Any moms who work or go to school and ebf can give me any tips? And will me being away certain days while baby takes a bottle will that make baby confused and not want to breastfeed when I am home? That is my biggest worry, that and being able to pump at clinicals and school. I was figuring I could pump on my breaks, about 3 times a day while I am away. Would this mess up my milk supply? Thanks ladies for any tips :)