Try it again at the 3 week mark or even longer. I think you'll find that all the flavors will meld and it will balance out.
What is your water profile like? I believe water that is very hard and high in calcium can bring out a harshness that is undesiarable in lighter beers. But the water geeks(
) can give better details on that. I know Yooperbrew has talked about having this issue in her brews, before getting her water figured out.