How do I know of I have sleep apnea our upper airway resistance syndrome? What came first? Cause of breathing difficulty? Tight neck muscles quickly

Get checked. It is very easy to establish , sleep study will tell you whether you have central or obstructive sleep apnea or even uars.
Sleep study. You should first be evaluated by a physician who can examine you and make sure there are no other obvious causes of breathing difficulty. The best way to evaluate sleep apnea vs upper airway resistance syndrome is with an overnight sleep study. You may be monitored in a sleep lab or sometimes at home with many sensors to help make a diagnosis.