Sleeping disorder or just not getting quality sleep?

I am 42 I take several perscription medications one is for hormones 2 are for sleep and 1 for depression. I think if I was not so tired all the time I would not be depressed. I had a hysterectomy years ago but I have never felt like I have been able to get a good nights sleep. I can remember feeling so tired in the afternoon it was hard to make it home from work. Now I just seem to take a nap, is this good or bad? I fall right to sleep, I don't drink a lot of caffine, I don't eat and go to bed, I don't exercise before bed. It feels like I am thinking in my sleep so I never get to the restful sleep. I wake up many times during the night about every 3 hours or so I am not awake long but still I wake up when I first awake I am thinking about something, anything . I have gotten a cd with soft sounds to sleep to, I have started to exercise some in the morning. I eat a pretty healthy diet and I am not over weight. I am just tired......Please can someone offer something