First ultra sound

Jessie
Has anyone had this happen? I had my first scan due to some minimal pink spotting when I wiped, last Thursday/Friday night, when I had my scan they actually dated me at 5 w 6d and I should have been 7w 2d from my LMP no heart beat at this stage but the sonographer said everything looked good and not for me to worry, has anyone else experienced this? <3 I had a miscarriage in February this year so very anxious with this pregnancy, should also note I have a retroverted uterus.