You may have developed a conditioned negative response to the idea of sleep, which is common among those who've experienced insomnia. Given your drug history and anxiety issues suggest you see a medical doctor who specializes in sleep. I suspect your solution will not be more drugs but rather a nondrug program like CBT sleep training methods for adults. Much good info online if you are the self-help type.
Thanks Morpheus for your reply but I need suggestions as the meds I taken now in this month with low dosage are hard to withdraw really would like to hear more opinion