Rebound insomnia following benzodiazepine use

[the outsider]

Is this a well-attested phenomenon? I've been almost completely sleepless the last 2 nights, after 4 nights of using 20-40 mg diazepam for sleep/relaxation purposes.

Or is it something else? Seems like a very short period of time to have built up such a strong insomniac effect...i'm completely shattered but the sleep ain't coming.