My sons doctor suggested I supplement feedings with formula after he was born to lower his jaundice level. He is now 6 weeks old and I want to go back to breastfeeding only. I suspect my supply is low because my breast don't feel full like they used too. And now my son has problems nursing. He latches on fine but after about 5 minutes of nursing he screams and rejects the nipple. I know milk is coming out because it shoots out when I squeeze my nipple so I'm not sure why he won't nurse longer and why he refuses to nurse longer than 5 minutes and how I can increase my supply ?