Bfing has been going well, up until last night. At around 8:30 my LO was acting hungry so I nursed her. She fed for about 20 minutes, which is normal, but then still acted hungry. So I kept offering her more but she would act like she was going to latch on, then start shaking her head back and forth and screaming. It was like she couldn't/wouldn't latch on. This and the screaming went on, off and on, for about 45 min. Finally, I got desperate and offered her a bottle of what I had pumped that morning. By this time it was about 9:45 and she drank the whole oz like she was starving. I figured that would calm her down because it appeared she was hungry. She was somewhat relaxed for about 30 min, but still acted like she was hungry so I let her feed, again. This time she actually did latch on and feed, but for only about 10 min. Then, the head shaking, no latching, screaming behavior started again. I tried rocking her, walking around the house, singing, everything I could think of but she still acted hungry but refused to latch. Finally, I caved and gave her a paci. I didn't want to but it was a last resort and she calmed instantly. I was worried about giving it to her for fear of nipple confusion and what if it falls out of her mouth while she's sleeping? Will she scream until I give it back to her? She ended up just sucking on it until she fell asleep and didn't scream when it fell out, and I didn't give it back to her the rest of the night. I feel guilty for having given it to her and like I'm doing something wrong because I don't understand her new behavior. Any thoughts?