I had a scan on the 2nd of February and the ultrasound technician couldn't see anything not even a sac, 4 days later on the Tuesday I had another scan this time showing a 7mm sac I was told to go back a week later which I did which showed a sac around 17mm but empty the doctor says this is common and they see it all the time and to go back in two weeks but the sac is already 17mm which puts me around 6-7 weeks shouldn't I be seeing at least a yolk by now ☹️