Images and tags no longer accessable from front or back end

Things were going along quite nicely. Single user blog with 15+ post. But on the most recent post I was unable to upload an image. Then noticed that tags were gone and location was just searching....

When I closed down, the images from the two previous post disappeared.

I've gone around and around including updating version and restoring from back up....nothing fixed the issue. The only change during this time as adding the sub-domain "blog" - which I deleted and still not images or tags.

Can you Help with this?

Thank you....