5w 5d ultrasound, good gestational sac but no visable too sac or fetal pole


So I had some like bleeding Monday and went into the ER. The bleeding stopped immediately but had some brown spotting/discharge yesterday. At the Er the said my hcg levels were normal but couldn’t see a yolk sac or fetal pole and told me to come back in a couple of days for another ultrasound abs blood test. Did I have a miscarriage or is there still a chance everything is ok? What’s your experience With this?