8 weeks with low HCG level

So here is my story. I went for my first appt today. My midwife wanted to check my levels before scheduling an ultrasound. She said I was 8 wks and 2 days.  So I did all that and it came back as 203. Obviously, not high enough. So I go back Wednesday to see if it's doubled. She said that its promising bc I've taken 5 tests since I found out I was pregnant several weeks ago and all have came back positive. The last test was as early as yesterday. I haven't had any bleeding or cramping and so she also said that's promising. Or I could just not be as far along as she thinks. Has anyone else had a similar experience at 8 weeks? Is it normal for it to be that low? I'm tired of waiting and worrying since I've had a miscarriage once before. I definitely know what that feels like.