I was working on a large file on my CS4 photoshop on my laptop. I was working on a digital painting, which has been fine. I saved it, before I was heading home from work, and when I got home to open it, it said that something was wrong with the file and i could either open it or not, even with it being broken. I opened it and it was a flattened black layer with the same dimensions. No layers and the image was completely gone. I am heartbroken. I hadn't had a chance to back it up yet, as I had nothing at work to do so. Is there ANY way of recovering a file that this has happened to? I tried to download some free psd repair thing and it just made a copy of the black screen. I am so upset, It was one of my best paintings. If anyone could help me, I would be eternally grateful! I hope someone on here will know what i can do.