Not everyone who suffers from sleep apnea is aware of it. Sometimes it takes the person you share a bed with to bring it to your attention. The most common symptoms of sleep apnea include loud, habitual snoring, periods throughout the night when your breathing stops for anywhere from a ten second period to a minute or even more, excessive daytime sleepiness, problems concentrating throughout the day and waking up in the morning feeling as if you had not slept at all.