Oh no! Are you having any symptoms? Bleeding...cramping..etc? I had the SAME thing happen. Dont lose hope! This last baby of mine didnt show up on ultrasound until 8w1d. My beta was over 20,000 at the first scan and I was 7 weeks. All they saw was an empty sac....no baby...no heartbeat...no yolk sac. We thought it was a blighted ovum since my betas were high enough to be able to see a baby. I went back a week later and BOOM. Perfect lil heartbeat!! My son is now 5 months old. Total miracle!! I'll even include my scan pics....DONT LOSE HOPE!!! The doc said I have a tilted uterus which makes seeing a baby really hard. Even tho the other 3 were seen at 5 weeks. What was your has HCG???
THIS WAS MY FIRST SCAN PIC