Measuring almost 2 weeks behind

Stephanie • 28. TTC baby number two!

Hi all, I should be 7 weeks tomorrow, but had my first ultrasound today and was only measuring 5 weeks. I had my ultrasound because i have been having some dark brown spotting for about 48 hours - they are having me come back for another ultrasound a week from today. I also asked if i could go in for some blood work to see my Hcg levels and they said they’d get back to me. Feeling frustrated and defeated.