how to restore an album and its content? (suddenly disappeared)

I've just got my new macbook air and i imported a lot of photos to iPhoto

and it took me so much time to arrange it by my order (different albums places times and faces).

after a few days it suddenly won't open and it asks to choose an album or create one. i was trying to choose the old one but it won't open so i pressed "create new".

I managed to restore my old photos but i am so mad! its not in the order and not in its places, its messy and doesnt arranged by how i did it before.

no albums, no faces, NO EVENTS. Also every one of the photos is titled weirdly with numbers and letters which werent like this when i first imported them.

in the begining i liked how it was but now i am so angry and absolutely not pleased with how it all works on iphoto. if i wont find a solution i would have to delete everything and start from zero.

what can i do to restore my original album and all its events before it suddenly disappeared? if its even possible.

thank you so much for help and sorry for my english.