I started suspecting it around 2003. I had to take a trip with a coworker that had a CPAP machine. I had heard of them but knew nothing about apnea and CPAP. I discussion, I started hearing some things that were sounding familiar: I loved sleeping on my back, but had gotten to the point where I just couldn't fall asleep in any position but on my side or maybe in a recliner. Daytime sleepiness was common - but I blamed it on blood sugar spikes. That went on for a couple more years and I generally felt miserable and then in late 2005 on a long trip I ran off the freeway into the median and I didn't remember a whole lot from the last couple of miles.
Had a discussion w/ my GP at the next physical that sounded something like "I really don't think that I have apnea, but I'm sleepy a lot-but I think that is related to blood glucose spikes. I don't ever feel like I sleep well, and I have trouble sleeping all the way through the night and I always get out of bed feeling sleepy and tired. I had this coworker that had apnea once and he had some of those same things going on. And I really, really don't think I have it, certainly not bad enough to need one of those silly machines, but what do you think? Maybe some kind of sleeping pill might help? ... "