You seem to have accidentally opened the wrong catalog.
Try File->Open Recent, see if any of the catalogs listed there has your photos. If not, search your hard disk for any files whose name ends with .LRCAT, and open each one by double-clicking on it until you find the catalog that has your photos.
There is no way it could be the wrong catalogue. It is the same one i open every day
And some of the pictures are there, just ot all of them - very random which ones are missing
Also is there no adobe Lightroom technical support number I can call/ i am pretty desperate to get some help with this - all my edits are gone and I have deadlines looming
Ok, I just discovered that all my photos have somehow been moved into the smart collections "without keywords". How do I get them back into the original folders?