6w 3 days feeling worried

Lulu
Hi guys so i went to the dr today due to heavy spotting. It was thick brown discharge that at one point became watery and i got concerned. My dr decided to have an ultrasound done on me. They dont see anything but a tiny tiny sac. They said the baby might not be growing appropriately or might not have life. It makes me sad. Im worried. They scheduled me for next week to see if then they can see something. All i can do is pray and be patient. It is in Gods ands and it will be as it should. Has this ever happened to any of you girls?