I have tried herbals, otc, and prescriptions for sleep. still can't sleep. i only sleep when i get so tired i just shut down and pass out. help!?

Can not sleep: This is a serious problem, and there are many causes. Discuss this with your doctor and ask about being seen in a hospital sleep clinic to get a diagnosis of the cause of the insomnia.

Need eval.: Agree with Dr. Pizzo. If you are having marked difficulties with sleep would recommend seeing a sleep specialist (and possibly a sleep study). If there is a significant problem - then the doctor can make treatment recommendations. In the meantime, use excellent hygiene.