Can't log in on lordaeron

ive been playing a character on lordaeron for a couple days now, i try logging in this morning and i get a fatal error, try logging into another realm with a different character and it works fine just to test, go back and try on lordaeron again, this time the screen goes black except for something saying "a character with that name already exists" as if i was making a new character before sending me back to the character select screen, im going to try uninstalling and reinstalling the game but if that doesnt work i dont know what to do.