My LO is 5 weeks and just got "diagnosed" with this. Just curious if anyone else has dealt with it? Our struggles were suspected reflux, poor sleep, and extremely noisy eating. I noticed that her neck flapped inwards when she breathed occasionally. We had a dr appt and she said that's probably what it is. I guess it can range in severity, so we just have to wait and see if it gets better or worse over the next few weeks. We're going to see a specialist in a few weeks if it doesn't seem to be improving.