Baby with gastroschesis

Brittany

I’m 33 weeks pregnant and my baby has gastroschesis, they recommended that I only breast feed because formula can hurt her intestines and cause digestive problems. Also might make her develop food allergies and might slow down the healing process. I have like this weird phobia with my nipples being touched so I only want to pump, I’m scared that I won’t produce enough to feed my baby. Any suggestions on things to eat or start doing to increase milk ?