I know the pain. I lost my hamster a few years ago and I still miss him when ever I feel something warm and soft. My mom and I both had a paranormal event with my hamster! His spirit appeared on part of the wall and ceiling of my bedroom as a shadow. We know it was him cause nothing in my room could have made it, the next morning the shadow was gone. I know he came back to say goodbye and we said goodbye to him and thats why we know his spirit left. We even gave him a small make shift funeral.
I know! At first I was freaked, but then I said. "Mom, it's Hammy!" We told the shadow we loved him and we miss him, I'm tearing up just thinking about it. Later that night I got to go to the bathroom no shadow. He was gone. I just hope my moms two dogs, her rabbit, and the turtle are taking good care of him in heaven.