I'd check the apnea thing out. My Doc. wanted me to do a sleep study because he suspected I had it. I kept telling him he was crazy because I never snore and I sleep fine (wife attested to no snoring). Long story short, I needed surgery to repair a hernia and they said I had to be checked before they would do my surgery so I said screw it and went for the sleep study. Turned out I was having not breathing episodes 70 times per hour! Severe apnea!. Don't let not snoring fool you.
You do not have to be a lardass to suffer from sleep apnea or heart problems.
I was 180 lbs. and 5' 10 and had heart issues at age 46. Saw the right doctors and got fixed, I'd be pretty dead right about now if my wife hadn't kicked me in the asss to get looked at. There is help but you must go get it, ain't gonna seek you out. Good luck brother.