severe insomnia

I have suffered with insomnia along with my depression for about four years prior to my senior year of high school, when everything started to get sorted out. For the next three years, everything was going great, I was sleeping because I was on heavy meds and I was getting a full eight hours in. Now, I move to a new city and am living alone for the first time and this terrible wave of insomnia hits me right in the gut and I haven't been able to sleep for about two and a half weeks. I need serious help. I'm not sleeping. I'm not going to classes and I feel like I'm going to fail. What do I do? Suggestions? Sleep remedies?