Why is my Hyacinth wilting?

Hi! I have a pink hyacinth that finished opening a week ago. The last time I had a hyacinth, I remember it lasting for weeks, but this one is already thinning out and darkening considerably. It also has lost its fragrance and smells unpleasant. I water the flower every two days and it gets indirect sunlight from a south-facing window (I live in northern Minnesota). Thoughts?