Just wanted to check to see if this happens to anyone else. I've noticed that when I am stressed/have an elevated anxiety mood, sometimes when I lie down I get (randomly) an unvoluntary snort/hiccup? 

It will happen once, and then not happen again. I say "snort/hiccup" because I don't have the full hiccup - it's like half a hiccup that temporarily stops the air from going down fully, then stops. 

Does this happen to anyone else?