Simultaneously wiggle and push your chin back to see if your jaw 'habitually' slides forward to give you your 'normal' bite. If it does slide back a bit, see if it feels harder to breathe. If it does, and with everything you said there, I bet you have mild sleep apnea. You haven't complained about daytime drowsiness, so I doubt your past ~15-20 OSA if you were to do a sleep study. Totally guessing on this by putting together my experiences with testing for airway and OSA problems.