my photos after being carefully arranged are a complete mess HELP!!!!!

My photo,s after being carefully arranged in iPhoto are now in a complete mess my albums have disappeared !!!! please can anyone shed light !!!!

What happened? Did you upgrade to MacOS X 10.10.3 and the new Photos.app?

If yes, how did you migrate the iPhoto Library to Photos? Did Photos automatically open your iPhoto Library?

You should be seeing the albums in two places:

1. If you reveal the Sidebar by pressing the key combination ⌥⌘, the albums will show in the Album section of the sidebar.
2. Or you will see them in the Album tab, if the Sidebar is hidden.

You iPhoto events will have been converted to albums and are collected in a folder iPhoto Events in the sidebar.

Moments in Photos are the new Events, i.e. groupings of photos sorted by date taken.

When the iPhoto Library was first migrated to Photos there was a folder created in the sidebar titled iPhoto Events and all migrated iPhoto Events (which are now Moments) are represented by an album in that folder. To open the sidebar if it's not already open use the Option+Command+S key combination.

There's a way to simulate events in Photos.

When new photos are imported into the Photos library go to the Last Import smart album, select all the photos and use the File ➙ New Album menu option or use the key combination Command+N. Name it as desired. It will appear just above the iPhoto Events folder where you can drag it into the iPhoto Events folder

When you click on the iPhoto Events folder you'll get a simulated iPhoto Events window.

The downside to the simulation is that the Albums/Events can only be sorted automatically by Title. But they can also be sorted manually, either in the sidebar or in the folder's window at the right.

Ask Apple for more sorting options in Photos via https://www.apple.com/feedback/photos.html.