No baby on ultrasound

Brittney

I thought I was 7 weeks pregnant based on my last period which was November 20th. Maybe I ovulated a bit later on in December instead of like the beginning of December. So I’m at the hospital because I was anxious to see the baby and how far along I was and they can’t see my baby on the ultrasound. Am I not pregnant? Which was confirmed by the doctor. Is it too early? Am I not 7 weeks maybe I’m earlier? At this point I’m nervous and scared.