Am I being southified?

Every now and then, during one of the many internal conversations I have with the various entities inhabiting my brain, I'm stopped mid-stream shocked and horrified as I catch myself using terms like "y'all" and other bits of Southern slang.

I don't think I've ever caught myself using it talking with real people yet, but the prospect of me inadvertently blurting out something like that frightens me.

I wonder if my friends will think my 'accent' has changed any since I last saw them.