By definition if you wake up after a reasonable amount of sleep and you are still tired, you have a sleep disorder.
Unfortunately there over 100 different disorders out there so it is important to fnd out what is causing your excessive daytime sleepiness.
I have a disorder called idiopathic hypersomnolence and no matter how much I sleep, I can still sleep more. I fall asleep in restaurants, parties, bars & even while driving. It's a little bit like narcolepsy but has a different make up to conclude its diagnosis. The treatment is the same as it is with narcolepsy but it's a little more frustrating in the fact that they don't know what causes it, nor how to treat the under lying issue. Therefore I can only try to treat my symptoms on a daily basis with medications. My particular sleep disorder effects less than 200000 U.S. citizens and is pretty rare as they come but like I mentioned there are multitudes of other disorders that could be contributing to your issue.
speak to your doctor and see about further testing to help get to the root of your issue.
Good Luck.
