how soon should I start pumping?!

Lisa
I've been breastfeeding my son for just over two weeks now. I would like to start pumping so I can actually leave the house for more than two hours. I've been reading that pumping and giving breast milk in a bottle too soon can cause nipple confusion. Also, I am still using the nipple shield when I BF (working on transitioning off of it). Just wondering what others are doing!!