A sign of ageing?

At the regular gym washroom.
I was walking from the basin,
Towards my haversack.
Smiled at a classmate who walked past.
Then it struck me.

Where am I ?

I stood there for a few seconds,
Stumbled 2 metres forward,
Managed to find a seat to rest,
And finally found my orientation,
After nearly a minute.
(No - it wasn't a big washroom.)

A temporary memory loss.
Stress? Fatigue?
Not sure about that.
Let's hope it is just this once,
For I don't want to suffer this,
When I am out in the foreign cities.