Is this in my head?

I’m primarily a vodka drinker. Recently, I’ve had a few occasions where I’ve had a tequila drink instead. On those nights, my sleep is awful. I toss and turn and cannot get into a deep sleep. No hangover, just no sleep. With vodka, I don’t experience this at all. How could this be? Is this all in my head? 41 year old female if that makes a difference. And no, it’s not the mixers.