I sleep a lot. i get 7-9 hrs of sleep but often feel sleepy during the day and can nap and still sleep a whole night could there be something wrong?

Yes: Many people with a sleep disorder will not reach the level of deep sleep that is needed to restore higher mental functions. This results in such a pattern of chronic tiredness. A process called narcolepsy is another disorder that can make you nod off repeatedly during the day. An evaluation by a doc who specializes in sleep disorders would be prudent.