[Tigre]

The question about "are you just walking?" sounds a little vague in English, even.

I'd probably say it as: Que haces? Andando por la ciudad?

Andando can mean getting around in general. Walking a bit, taking a bus somewhere, whatever.

To say "a few months", I'd probably use: por varios meses.

Pocos meses I would understand to mean closer to "not many months".