8 weeks but measuring 6

Zoey

Had my first scan today. It was a trans vaginal ultrasound. From my LMP I am supposed fo be 8w2days but they said I’m measuring 6w2days with no heartbeat detected. They are wanting me to go back in two weeks. Has anyone else had this and everything been ok? My cycles are regular and typically last between 26-28 days so don’t understand how I can be 2 weeks behind ☹️