Why do I wake up feeling like I haven't slept?

There are several causes of unrestful sleep, such as obstructive sleep apnea, medications, especially overuse of sleep aids, stress, depression, anxiety, and alcohol. Symptoms of sleep apnea can be snoring and periods when you stop breathing in your sleep, causing you to wake up suddenly due to the fact that your brain was not getting enough oxygen. Doing this several times per night can cause severe sleep disruption, which leads to unrestful sleep. Medication can affect your sleep center in the same way alcohol does.