Just wondering..

My son will be a week old tomorrow. He was breast feeding fine in the hospital. Then once we were home he started to fuss & long story ahort I've been pumping.. I was wondering what's a normal amount to be pumping at this stage? I notice at night (around 2/3 am) I get almost double what I get when I pump during the day. I haven't been able to make a "stash" of milk yet. Should i have a stash by now? Or is it normal to be 3 bottles ahead?