404 error message when logging into wpadmin

Hi Everyone,

Last week I signed up to Bluehost and started to work on my very first wordpress website. Today I have tried to log into back into wpadmin to continue designing, but I am only coming up against the following message.

Not Found
The requested URL was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

I have googled, YouTubed, tried to start completely again, with no sign of hope. I am not techie AT ALL, very much a designer, and I feel this is a very simple problem to someone in the know. I just wish that person was me. I have spent 4 hours trying to tackle this. One of the solutions mentioned changing my wp_options, but I do not even this I have Tt5_options page.

Any help would be greatly appreciated.
Thank you.

The page I need help with: [log in to see the link]

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