How far along is my baby?

Monica

I just had an ultrasound done in the ER last night and they said I couldn’t be more than 4 weeks along gestational wise. They couldn’t see anything but a sac and yolk. However, my last period was May 8th and I’m pretty positive I ovulated around May 21st. So shouldn’t I be a little over 6 weeks gestational and 3 weeks conceptual? This is my first pregnancy and I’m a little confused.