Insomnia Support Group
Insomnia is a symptom, rather than a disease, and is characterized by inadequate quantity or quality of sleep. People with insomnia complain of difficulty falling or staying asleep, which results in significant impairment of daytime functioning. Insomnia is categorized as transient (shorter than one week), short-term (one to three weeks) or chronic (longer than three...

Because of your depression you should definitely plan to see your doctor for help. Insomnia is treatable, and without drugs or other substances as well. In the US, the gold standard are CBT sleep training methods. That, along with dealing with your depression, should go a long way to helping you.
good luck.