I am the mother of a 1 week old little girl. When we were at the hospital after delivery, she latched on without a problem. Now that I have had to supplement formula, she is not interested in breastfeeding by latching on. I have tried pumping, but only am able to get 1 ounce total after pumping both breasts for 15-20 minutes. Whenever I attempt to get her to latch on, she screams. Please HELP!!!!!!