Insomnia

It is 4am, and I have been awake since 2am. I didn't even try to sleep until midnight. I have been laying in bed staring at the sleeing for a while... I have counted sheep... I have done relaxation exercises... nothing is working. Honestly, the last night I can remember getting more than 4 hours sleep was a couple of weeks ago, and I wasn't even in my own home. Any magical solutions would be much appreciated... I'm not sure how much longer I can survive on so little sleep!