For me I was falling asleep while driving, extremely tired all the time, would wake up choking, and would basically throw up in my mouth while sleeping, and my bp and hematocrit were high. Until my sleep study I had no idea the severity of it. They only let me sleep 3 hours and woke me up to put a mask on. I thought I slept great, but I stopped breathing 240 times and for 58 seconds at one point. Weight reduction can help, but I have central sleep apnea as well, which is where the brain stops sending signals to breathe. I have an auto set cpap which detects the apnea, what kind it is, then delivers the amount of pressure I need to keep my airway open. Sleep apnea is no joke. Main cause of atrial fibrillation, increases risk for stroke, heart attack, etc. Only way to find out if you have it is by a sleep study.