Help me find emergency drug

Hi.

I need something, anything, for anxiety induced insomnia before important events.

Only 2 criteria: - has to knock me out despite high anxiety - not make me feel retarded the next day (i need high cognitive function)

I will only use this once or twice a month, only during important events. I dont have much insomnia daily, so dependance is not an issue.

Anything goes, opiates and benzo included.

UPDATE: So far suggestions are for different benzos, lyrica, pheninut and ambien. Any benefit to mixing those together? Obviously with caution.