Old wives tales? ₩

So yesterday my MIL did the hanging crystal over my wrist. It quickly strayed swinging in a back in forth motion for a bit and then straight into a circle motion. Everyone else it stopped in me tween movements. She said she believes I'm having twins, a boy and a girl. I have been saying for a bit now that I feel like it could be twins. I am currently 9 weeks 4 days and have my first us next Tuesday, guess we shall see then. Anyone else ever do the crystal test and if so what were your results?