Um, just thought you should know that
*aprilsarts has done a very similar painting. It really looks like the same girl in this picture with the hairstyle and everything - her piece is called "winter elf." Here is a direct link:
aprilsarts.deviantart.com/art/…
I hope she just took inspiration from this painting of yours and everything is okay. I'm giving you the benefit of the doubt since you're a professional and we saw the work in progress, plus you posted 5 days before she did...