I was mainly exclusively breast feeding after we came home from the NICU and he stopped having the fortified BM in bottles. Every once In awhile DH would give him a bottle at night to help out. I returned to work a few weeks ago and sadly to say, I think he is experiencing nipple confusion now. He often pulls away and screams and fusses at the breast and it takes awhile to calm him. I know it's not a supply issue because if I pump I get about 3-5 ounces which is what he takes. I usually can get him going, but it takes awhile and for an entire day he wouldn't take the left side! I am trying to nurse him now as often as I can when I am home. Hopefully he will figure it out! He is currently 5 months, 2.5 adjusted.