Ultrasound didn't go as I'd hoped..

I'm supposed to be (based on my first day of last cycle) 7 weeks & 5 days today. They did an ultrasound of my abdomen and vaginally and all they saw was a sac and no baby..not even a flicker. They said I was in a "Grey area" right now and it may just be too early to see anything but I look on here and everyone else seems to have clear pictures! I'm just so worried and disappointed. I want everything to be ok. I have a follow up in a couple weeks and I'm trusting God that I will see my baby and that everything is ok! 😥 Anyone else experience this??