Scared please read

Sammi • Have had multilple miscarriages and pregnant again, praying hard for this one to last!
I have had 3 miscarriages in a row. I found out I was pregnant again and went to the doctor. They did a vaginal ultrasound and couldn't see anything. Doctor said that was normal because I was only 5 weeks along. However, my hcg levels were 3800. He said we should have seen something with hcg levels that high. I go back tomorrow to get more blood work and another ultrasound.... I was just praying this was going to be the one! Has anyone had this happen?