I went to my first ultrasound yesterday and the doctor told me I had an irregular sac, I didn't really understand what I was seeing on the screen, had to google it. I have a normal shaped yolk sac (my attention was there thinking that that was the sac 😳) I can't remember if I saw anything else inside the sac... I'm scheduled for another ultrasound next week, but was told I could have a miscarriage and I'm freaking out, anyone has had a similar experience that  might help me out? I'm supposed to be 6 weeks and 3 days.