icloud shared albums

hello everyone, I have a problem with my icloud shared albums. I had created a shared album from my account but, since I could not download datas on my phone from this album, I tried to log out. Now that I've logged in again I can see all of my shared albums except that one, seems as it has disappeared. Do you know where can I find it or if there is a way to recover it in case it has been lost? It is important, there were lots of important pictures and videos for me. Thanks!