Dye stealer!

Kylie • TTC our rainbow baby 🌈💕🙏🏼

I'm curious what everyone thinks. I'm estimated 4 weeks 3 days. I have a dye stealer. Is this normal?? This is my first pregnancy. We've been trying for 5 years! My coworkers keep teasing me that I'm having twins because my BETA HCG nearly tripled within 48 hours last week and my lines are super dark lol.