Lost al lot of Icloud Photos.

Hi all,

Recently I've updated to the new icloud photo's. Since somewhere then I've lost a lot of my old photo's. Like really, a lot.

I have 2 TB of icloud storage with only 400/500 gb in use. I used to use way more for photo's but now it's down to 150 gb. And all those photos are gone too, on all devices (mac, Ipad, Iphone). I am logged in to the right account and also have enough storage. Are they gone forever? Nothing is in the recently deleted or hidden folders aswell...