Do you like this name?

Christie really isn't a bad name. It's cute. I like the nickname Chrissy, but that's still pretty similar to Christie. I wouldn't change your name now, as you said it's everywhere. I mean, it is your name. . . you're going to have to live with it no matter what. My cousin's name is Kristina, and she goes by Stina so maybe that's also an option for you, too. If you want to change the name entirely, you could go by Tina. I say stick with Christie or Chrissy, though. Good luck. :)