Sooooooo,

Why is it US instead of PK?

I am pretty sure it was PK a week ago.

where do you come from ? PK ? what is PK ?

If you search it in google, PK is Pakistan.

Pk is country code for Pakistan.

And yes, i am from Pakistan but my country code is strangely "US"

US = United states?

usually when you(or someone else) login on your account from another country ur code changes to that country's code
i was in russia for 2 weeks and my code was ru
and when i came back to croatia it was hr.
idk why yours acts that weird.

do you use a proxy? like tor or something

that would explain it