early scan. kinda worried

Paige

Gestational sac is measuring 5 weeks and 6 days. But there is no way in that far. My doctor also thinks I'm only 4 1/2 to 5 weeks. I go back in a week to see if everything is developing well. My hcg are 14,000! And doubling every 48 hours. Wound you say it's a yolk sac to the right?