scared

Jessica
Went to get an ultrasound yesterday & im supposed to be 8wks. However, the gestational sac is measuring 5wks and 5days. They did however see a yolk sac. Their only concern was they saw no fetal pole. I'm worried cause I don't know if theees gonna be a baby or not my next appointment :( anyone have this same experience? This is my first pregnancy also, so I'm new to all these changes. Thanks!