6 weeks 3 days only sac

Im beyond scared and sad, I went to the ER today because I’ve been experiencing pain my left side. I have history of ectopic so I wanted to be sure.. they did vaginal ultrasound and tech said she was only able to see a sac. She said this can go two ways, it can still be healthy pregnancy or stopped developing.

Please anyone have similar stories? I can’t stop crying

Edit- I’m also not sure on my dates,

I will see what the doctor says about my measurements