Spotting...?

Brittany • Been blessed with my rainbow baby girl. 21 years old. Married💕
I went to the bathroom And I just had light pink spotting after I took a very long nap. I had a transvaginal ultrasound today and they said baby looks good and heartbeat looked good. They said I'm about 6w 4d. But I thought I should be farther. I just am so lost right now.