This is Dr. David
how long have you taken each of your medications?
the zopicone is the most recent?
why are you taking the sertraline?
the zopiclone could be interacting with the diazepam and sertraline to cause this excessive exhaustion and strange feeling.
there are drug interaction warnings when mixing those three medications together
that you can have severe CNS depression and excessive sleepiness when mixing those three medications together.
does your doctor know you are taking all of them?
have you had a sleep study to evaluate your insomnia?
do you use caffeine or drink coffee during the day? this can worsen your insomnia .
do you exercise? exercise can help improve your sleep.
do you snore? snoring can be a possible sign of sleep apnea and this can cause problems with sleep.