How often/how long do you pump? breast feed? How old is your baby now? I've been pumping for 11 months and, in the beginning, I had to either pump or bf at least 8 and usually ten times a day. I just got in the habit of doing it and stuck to it but it is hard. As pp said, pump in btw feeds as often as you can. Milk production is supply and demand in addition to hormones, so the more u pump the more u should produce. Doing this until your classes begin should help build your supply so you can store some for use while you are away. Good luck!