I have been at the pump for two weeks. Every time I pump I am very nauseated. Why??

You can try to snack before you pump and after. I usually have a hot milo before I pump. I find it also increases the yield. Increase your water intake as well. It will get better. I no longer feel nauseous after my 2nd month. All the best! http://kellymom.com/bf/concerns/mother/nausea-bf/