can’t access wp-admin and page style is gone

About two weeks ago I noticed the look of my page (www.whatabouthoney.com) had changed. All the raw data was there – images, posts, comments – in the correct order, but fonts had changed and info that normally forms the right sidebar was on the bottom.

The “edit” link no longer appears above each post, and I can’t access any admin pages. My header – which is normally a JPEG of “What about, honey?” in a pink typeface on a white background – has been replaced by standard text.

This has happened twice in the past 2.5 years, but only for up to a day. Then it goes back to normal.

This time it has lasted more than a week and has gotten me worried. I have attempted to perform the following possible “fixes”, with no luck, and would really love some help:

1. I guessed that my version of WordPress had been declared obsolete and was no longer compatible since the launch of 2.1.2, so I tried to upgrade. I attempted a two-step upgrade – 1.5 first, and then 2.1.2 – with no luck. I should note for reference that I was unable to see any .htaccess files (so I don’t know if I had these), and I was unable to disable any plugins as suggested (because I could not access the plugins page).

2. I have contacted my host (godaddy.com) and verified that it’s running PHP version 4.3.11 and MySQL version 4.0.27, which both meet the minimum requirements. Godaddy can’t spot any problems, and the fact that all of the database information is still present suggests to me that it’s more of a scripting error.

At present when I try to access any wp-admin pages, all I get is a white screen. I have tried to go about it in a roundabout way, too, by going directly to the “edit comments” link saved in my favourites, but I get the same thing.

Any ideas? I’m about to pull my hair out.

Please note that the version currently up on the web is the attempted upgrade to 2.1.2. I made a backup of the original and can put that back up on the web if someone thinks that might help. But the wp-config and index files are identical to what I started with.

Thanks,
Erin