Freaking out

6 weeks 2 days; my hcg has been doubling but I’m on progesterone (ivory colored). Woke up to brown spotting in my liner. Nothing when I wipe. Please tell me this isn’t the beginning of the end. 😰

The nurse said this is really common and not concerning since it’s brown. I have my first scan next Thursday and I’m terrified that I’m never gonna get to see this little one either. I never had any sort of spotting with my two successful pregnancies.