Hi!
Although my twins were biological, I did nurse preemies... They were born at 30weeks, and were tube fed for weeks. They were in the NICU for 7 weeks, and I bf'd when I could get there, but they had bottles a lot of the time while they were in the hospital. I saw no nipple confusion. We had our issues-- like reflux, apnea during feeds, my engorgement- from pumping and making WAY more than they needed- was causing me to DROWN them at the beginning of their feeds, etc. But, it worked itself out and I am so happy I stuck with it! Take it slow, be patient, and know that you are giving that baby the best!! I suggest finding a great lactation consultant to help you out. The first time I nursed one of my boys, he stopped breathing, heart rate started to plummit... and all the nurses had to run and help stimulate him to get breathing again! Nursing/Feeding/Just Parenting preemies is not for the faint of heart! but, with good support, you will figure out all you need to know!