The phrase I would use in my dialect of English is "I'm somewhere around here".
I am not sure this makes sense. You are either somewhere or you are here; please explain.
Imagine that you point someone some area on the map and you know that you are somewhere within this area but you don't know where precisely.
imagine that you are tipsy or high)))
Is it possible to change the words here? Maybe "Tutaj jestem gdzieś." ?