I grew some Widow.
Here's the information you need.

Real White Widow takes 55 - 65 days.
Do not depend on pistil coloration.
Many things can color them.
Pollination, physical trauma, temperature, overall health, etc.

And the Widow's pistils can stay frosty white right to the end.
Hence the name.
The smell means you are getting there.
At 7 weeks is when the buds really swell.
At 8 weeks and change, she will be ready.

And there's nothing horribly wrong with taking a "sacrificial limb" for testing.
We've all done it.
Only problem is, if you take a week to dry and try the rest will be at least a week older, yah?
The actual mix of side effects will necessarily differ.
So, all you get is an idea of the strength and taste.

That's exactly why I always stagger my harvest.
You can get three different sets of effects that way.

I take about 1/4 when the trichs are mostly cloudy.
Almost half of what's left at 10% amber.
I try to let the rest go a bit longer for the higher cbd ratio.

Another week or so and yeeha! Widow is excellent!

Aloha,
Weezard