You're still a Scorpio- just like I am :)
The person who said the signs have changed wasn't an astrologer at all, and had no idea how the system is actually historically supposed to work. It isn't designed to be changed, so you don't have to worry about being something weird. There's also a rumor going around that the "new sign" only applies to people born after 2011, which is also false. Nothing changed, and the system is still the same.