Been following you for a few years now and during that time I like to think I can tell your work from another persons. Well sorry to tell you, here is a guy with some of your work that he is claiming and trying to sell. There appears to be a small watertype mark on it too.
I've filed a copyright complaint, but sadly DA won't do anything unless you handle this yourself. I would go through the rest of the gallery in case I missed more of your work because it's all stolen from other photographers.