I've been having the breathing issue as well. I also couldn't yawn. It started last summer, before surgery when I was under extreme stress. From my personal research I think it's a psychological issue. Might be anxiety. I read that most times it goes away again, but it will take months or even years. Now that I'm having much less stress (still in recovering phase) it's almost gone. Sent from my Moto G (5) Plus using BariatricPal mobile app