Sleeplessness and Extreme Daytime Fatigue

At night I find it difficult to fall asleep without some sort of sleep aid. Even when I do get decent sleep at night, which is rare, I feel so fatigued and weak during the day. It's to the point where I can't even keep my eyes open and I feel my self nodding off. I do have extreme depression, anxiety, and ocd and are medications for it. Also, I probably do not eat like I should with balanced meals and such.