Gender reveal?

I'm 15 weeks and I jus went for my check up. I was expecting a ultra sound. But all I got was a heart beat. I gotta wait til June 23 for a ultra. I begged them to scan me but they said it's too early but other girls are knowing earlier than 15 weeks! And I'm still having to wait. 😩😓 I really wanna know what I'm having. Any way I can know before then?!