If you use a German yeast and not a German hop then you've shortchanged yourself.
I'm all for experimentation...as long as it's labeled properly. However, if you do not use a German hop AND a German yeast it's not a Hefe Weizen...it's "SOMETHING" else, just NOT a HW.
Since you used German yeast and an American hop...it's not a HW...a wheat beer, yes, a HW, no.
Point boing, if when making a wheat beer it's either German, Belguim (who have strict rules) or American...when not followed to the letter for the first two...it's simply a (bastardized) American beer.
That said, I hope it works out for you, but don't call it a Hefe Weizen...please.