Yeah, unfortunately DuckDuckGo doesn't return great results for the forum, and also returns a lot of the ".to" extension, which is a phishing site. If you entered your details on that site, then you need to change your password immediately.
As mentioned, including "site:bitcointalk.org" at the end of your search will limit your results to the real forum only.
I'll also just quote
this post by LoyceV for anyone who is interested - to protect yourself in the future you can block your computer from accessing the ".to" site.
You can use your hosts-file to stop your computer from ever accessing that site again.
I totally fell for the cloned site, until I realized I couldn't see your trust ratings.
I have added this line to /etc/hosts
127.0.0.1 bitcointalk.to
Now my computer can't access that phishing site anymore.
If you don't know how to do this:
How to Edit Your Hosts File on Windows, Mac, or Linux.