Just transferred from wordpress.com

I wonder if anyone can help me.
I’ve just transferred from wordpress.com to .org
My domain name has always been https://www.pressiesbypebbles.com

I was led to believe that old links would still work as i had my own domain name however they’re not working.

For instance – https://pressiesbypebbles.com/2012/11/11/to-sleep-or-not-to-sleep-thats-an-insomniacs-question/

Thank you for any advice