I am exclusively pumping as I cannot get my daughter to latch on. I am pumping every 2 hours during the day (about 8 times per day) and getting 2 oz (1 oz/breast). This is just enough to keep up with my 15 day old. I will be returning to work soon and would like to build up a supply. Is this a normal amount to pump, I feel like I should have a higher quantity output? What can I do to increase my supply?