I had one about 7 weeks or little shy of 7 weeks you don't see much it looks like a kidney bean is all it looked like for me..
I had mine at 7 weeks. Looks like a blob of nothing pretty much. They had to do a transvaginal ultrasound because they couldn't see anything, but I have a tilted uterus so it is really far in my back so it was harder to see
I had one at 6 weeks. It was just a tiny ball ddx rly c much
I had my first scan at 6 weeks 5 days and saw my baby and heartbeat