Today is 6weeks 4days from LMP. I had an

IUIdone on September 16. Today I had a dating ultrasound where they found a gestational sac and a fetal pole but couldn’t see a heartbeat. The paper the technician had showed CRL (crown rump length) was 0.37cm (3.7mm) and beside it she had written 6weeks 0days. Does that mean that I am not 6 + 4days like I thought? The doctor at my clinic said it’s good that there’s a sac and fetal pole, I’m just worried as I thought there would have been a little heartbeat. I’m starting to worry that something is wrong and looking for anyone who can share a similar experience. I’ve also attached a picture of my ultrasound in hopes any of you ladies can help ease my mind.