I am having trouble sleeping for some time now. 2 - 3 hours a day, then working my 12 hour shift. I am so tired my eyes hurt. I have tried melatonin. No luck there. Dr. gave me Ambien, which will knock me out initially for two hours. Ambien no longer even knocks me out. Dr. then said take two. Well, that knocks me out for the same two hours. And a BIG drawback here is if School calls, there is no possible way I can go get him, or meet with anyone. I do not feel safe getting into a car and driving. Any suggestions?