Albums in Photos

I just upgraded to High Sierra on my iMac late 2012

I always download the latest upgrades for all softwares

When I opened Photos, and after some presentation on the new upgrades, all my albums, with the exception of the current year albums, are not longer showing.

I tryed creating a new Smart Album, like pics in the last 10 years, but only shows some from last year and all bunched up, rather than in albums.

It appears that I lost like 30 to 40,000 pictures