Same here. When this was new I had 10 tabs open with articles about this dress, they were all white and gold. Then all of a sudden on the 11th tab I saw it as blue and black and thought it was a different picture. Went back through the other 10 tabs and they were all blue and black now.
I was able to see white and gold once more a few days later, but it was short lived and I haven't been able to see anything else but blue and black for years now.
I was convinced that half the internet was just lying back then, like one big global troll fest, especially since everyone I knew saw the same white and gold as I did. But just now my wife suddenly saw it as blue and black and she thinks I'm crazy, even though we both saw it as white and gold back in the day. So now I finally know that people were telling the truth.