Thank you so much, all.
All of his tests point to a floppy airway that is collapsing under stress. This is not uncommon in children with Down syndrome because of their issues with low muscle tone. It sounds like it's something that will just take time to mature, but we're not sure just how long it will take. He's doing okay right now, and is on tube feeds and high-flow oxygen to help keep his airway open.
I've been spending my days at the hospital and it sure is hard to try to balance everything. I'm thankful that my DH is off work for the next couple of weeks, but I feel so torn between my kids at home and Timothy at the hospital. I just hope it won't be long before we can bring him home.