Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello first let me explain my problem early today I was playing and thought to look at the other realms I looked at them and accidently clicked on a test realm and pressed okay yes I know pretty stupid of me now I cant even log into to change the realm if anyone has advice to help please tell me thank you so much for looking at this post!

I foresee...a sticky thread in your future...yes, one that explains how to...how to fix connecting to the wrong realm...