Melatonin - Height Growth - Potential mechanism of action (?)

Since May of 2021 I've been taking Melatonin 1.8 mg each day. Sublingual form: https://www.rossmann.de/de/gesundheit-greendoc-melatonin-spray-intense-18-mg/p/4036581536962

Reason for why I take Melatonin? I had difficulties falling asleep. Melatonin helps greatly to fall asleep.

Yesterday a GP measured my height and weighed me. To my surprise he measured 178cm (5'10). I measured myself once more at home and confirmed the 178cm height.

Before 2021 I was 175cm (5'9). I know because I measured myself in 2018 before my septoplasty and was measured by doctors in the clinic.

Not that I am not happy, but why the growth? My growth plates surely are fused in my thirties. And why would Melatonin cause height growth - provided that it's the cause!? Sure, there is some tentative evidence that Melatonin might boost HGH, but with closed growth plates HGH won't make people grow.

I only take Melatonin. (I did take some antidepressants before 2020, but discontinued them at the beginning of 2020)

I am not sure what to make of it...

Did anyone experience something similar on Melatonin? Is this a common "side effect" (although I would call it "nice effect")!? Should I have a talk with my MD regarding this growth spurt anomaly?

Strange experience I've had with Melatonin: 0,9mg didn't put me to sleep but rather on the contrary made me agitated and "aroused". 1.8mg give me perfect 7 hours of sleep. 2,7mg make me sleep 14 hours. I haven't got the guts to try higher dosages. Although it would be interesting to try 5mg. Just to see what happens...

Oh, and the dreams on that stuff are "hyper".

Today I've been to a pharmacy and did get measured: 178.5 cm

That's the Melatonin Spray I've used:

I also experienced leg and limb pains while taking Melatonin. Very strange.

Never heard this Kind of bs

It no BS. It's what's happened to me.