How much did you take?
IIRC, during my benzo taper and quit, and suffering badly with insomnia, I once took 5 of the 50mg gel capsules, justified to myself on the grounds of tolerance. I had worked up to that dose over a few nights. However, even that dose did not really help me sleep, I was dreaming though, whilst still at least half awake, in bed at night. It was totally fucked up.
I've heard it said several times, that lack of sleep never killed anyone, (people will get some sleep before that could happen,) but people being desperate to sleep, and overdosing on downers has killed plenty.
I guess I'm lucky I wasn't around during the time of barbiturates, as I'd almost certainly have been one more of those statistics. Benzos, SSRIs, and OTC sleeping aids these days do generally seem so much safer (at least in terms of lethal overdose risks). Even to the point of taking crazy doses, like 45mg of Etizolam pills, and unknown amounts of phenazepam (not at the same time, thank God!) I guess even they must have their limits as to what the body can take though, especially if combining with strong opiates, and / or lots of strong alcohol, such as whisky.