Hi Zizi , your sentence is correct. هفته گذشته/قبل چیکار کردی؟ >>>> what did you do last week? این هفته چیکار کردی؟ >>>> what did you do this week? این هفته چیکار می کنی؟ >>>> what you're going to do this week?

Yes it's totally correct. You also can say این هفته چکار کردی؟ این هفته چکار میکردی؟

Hi Zizi! That's correct! :)