my son was 4 weeks early and after a myriad of issues he was given to me at the hospital after 12 hours in the nursery. He did not want to latch and had a very weak sucking reflex. They gave me the nipple shield to help him latch on which it did, but it has now effected my milk supply and he will not latch on without it. He is not gaining adequate weight and I am certain its because he is not getting the hindmilk because of the shield. The have me supplementing with formula which he is not tolerating well. Any suggestions??