The symptoms of obstructive and central sleep apneas overlap, sometimes making it difficult to determine which type you have. The most common symptoms of obstructive and central sleep apneas include: 
Loud snoring.
Episodes in which you stop breathing during sleep — which would be reported by another person.
Gasping for air during sleep.
Awakening with a dry mouth.
Morning headache.
Difficulty staying asleep, known as insomnia.
Excessive daytime sleepiness, known as hypersomnia.
Difficulty paying attention while awake.
Irritability.
