Yes, circadium rhythms have something to do with it, too.

I read yesterday that, when we wake up in the middle of the night and can't go back
to sleep, eating some raisins and a little butter will usually put us back to sleep soundly. (It has to do with cholesterol activating the serotonin receptor sites that are supplied with "food" by a little cholesterol and sugar.)

Lemon-honey cough drops do it for me.

You might try that as an alternative to taking additional meds that add to the acid
load we already have by taking meds. (They all leave an acidic residue.)

Sleep well, Coco.