Hi girls, I just had my baby two weeks ago and have been having trouble breastfeeding, so I plan on exclusively pumping.So far so good, but I was wondering about some general things. When I pump I can get 3 1/2 to 4 oz. total per pumping session.(I have a pisa)Is that enough and when will it increase?Also when does your supply become established so you can stop pumping 8 times a day?My baby seems to be hungry all the time now so how do you build a stash? Sorry, I am sure these questions have been asked but I really need help! TIA Cindy and baby Randy