Worried first time momma

Krystin
So  I thought I was 7 weeks 6 days today according to the first day of my last period (April 27) I went to a free clinic for an ultrasound Becauae my ob can't see me until August 1st and they said I measured 5 weeks 6 days which makes sense since you tend t ovulate 2 weeks after you period. But we could only see the sac And I'm freaking out us that normal? Please any advice  would help me🙏🏼🙏🏼