Cannot access my wordpress website. Please Help

Kicking myself for changing this! I just thought I could change it back if it didn’t work.

Under Settings, General Settings I decided to change the WordPress Address (URL) AND the Site Address (URL) categories, thinking it would get me closer to uploading my site to my Godaddy Host (Godaddy has all my files). Both categories originally said, https://mitzidesigns.com/and my password.

I changed both areas to: https://www.mitzidesigns.com.
Removing the extended password letters. Now I cannot access my wordpress website at all and what appears on screen is 404 page not found.

Please don’t tell me I’ve lost everything!! A real bone-head move on my part. How can I fix this???? Thank you for reading. Hope there’s an answer to my dilemma.
FIRST TIMER with Web Design applications