Is there still hope?

Shari

My last period was October 18th. Based on bbt and opk’s I ovulated on November 3rd. I went last week for a ultrasound all we seen was a gestational sac and a yolk sac. I had a rescan today and I should be 7 weeks but still we only seen the gestational sac and yolk sac. I’m really scared now! Please tell me there is still hope. I go back for another rescan ultrasound next week.