Accidentally Alcoholic?

Hey everyone!

After F2 (usually 4 days, usually using blended blueberries and strawberries), I put the 64oz growlers in the fridge to let them cool off before I open them, so the carbonation is less explode-y. Sometimes, though, I don't get around to opening and straining those growlers for a while. Maybe it's placebo effect, but I seem to have noticed a trend, where if I leave those growlers with the fruit in in the fridge for 2-3 weeks before I strain them, once I get around to straining and drinking, it definitely gives me a little bit of a buzzy feeling.

I am not a lightweight by any means, and I've done very long F1s on my heating mat that don't produce the same effect. Is there something to leaving the fruit in for weeks, even if it's in the fridge? Does anyone know why this might be? Am I crazy?

TIA