You've gotten great advice. I just wanted to chime in that first, yes, it's perfectly normal.
And 2nd, please don't look at how much you pump as an indication of your supply. Your lo can get more out of you than you can pump. Some women, even with oversupply, can hardly pump a drop. It's just how their bodies resond to a pump. {{hugs}} I just didn't wnat you to be discouraged if you saw a small output.