One of my girls does this funny head shaking thing before she latches on. She thrashes her head back and forth like she's frantically trying to find the nipple even though it's already in her mouth, she just needs to start sucking. She did this when we first started trying to nurse in the NICU and I figured she'd outgrow it, but she hasn't. She does it at the breast, but also with a bottle or pacifier. Anyone else have a little one who does this?