I've been telling people that I'm a Leo as a long-con prank but my plan is getting out of hand

I think astrology is one of the dumbest, most unscientific things you could possibly believe in. Honestly, I would judge someone less for believing that the earth is flat or being a scientologist. At least Scientology has an established lore of writing created by a limited number of people, whereas apparently anyone can write horoscopes for any small-town newspaper and people will still follow their local little blurb's advice.

Anyway, there's a group of co-workers at my job who are way into astrology. They're always talking about signs and compatibility ("it didn't work out because he's a Gemini" etc). Sometimes they talk about people at work and their personality traits based on their signs. When they asked me, I told them a fake birthday without even knowing the sign associated with it. It turns out, that, based on this information, I'm a Leo. They practically fell all over themselves telling me how much sense that made. "You have such a creative spirit!" or "you're so generous!" or (my favorite) "You're so VITAL" (wtf). We're all pretty friendly with each other so I thought it would be kind of funny to do this and then reveal to them later that I'm not a Leo at all to see how they reacted and covered for themselves to justify their ongoing belief in magic star influences.

Well, unfortunately, one of my bosses seems to believe that me being a Leo makes me uniquely suited to work on various projects and I've actually landed on some good opportunities because of it. After a presentation to clients, I was recently told that my Leo spirit was really carrying the team through such a difficult deadline. Now I'm genuinely worried that someone is going to figure out my real birthday (I work for a big company that has my real birthday in the system and there's a chance that some weird auto-generated public email or post somewhere will congratulate the October birthdays or something). I am basically caught up in a lie that's based on nonsense to begin with and I'm really confused about what to do. I will probably never tell anyone at work this information, so I figured I'd tell a bunch of strangers on the Internet in the hopes that I don't get found out and have some kind of weird disciplinary action taken. Imagine my boss firing me for pretending to be a Leo? That's SUCH a Pisces thing to do. KIDDING. (help)

EDIT: I am absolutely loving people saying "That's such a libra thing to do" or "it's just like a libra to get into situations like this." I said I was born in October but didn't specify the date. I'm not a libra either.

EDIT 2: People who are defending astrology by telling me that it's much more complicated than just your birthdate, and then proceeding to explain detailed nonsense about the movement of the celestial bodies--that is not the convincing argument you think it is

EDIT 3: Kidding. I'm a Libra. So all those people saying "That's so scorpio"--you're the ones who are wrong. Or is that what a scorpio would say to throw you off the trail? Who knows? According to google, libras gravitate towards intellectualism, so maybe this is all an elaborate thought experiment. That's so Libra of me. Or is pretending I'm a Libra the Scorpio move?