I don't understand

Ashley

Hey ladies. Today was my first visit with my clinic. Judging by my LMP, I would be 7 weeks & 5 days today. But I told my doctor I ovulated 4 days later than usual and I knew a for sure day by charting my CM.

Now, she says I'm more like 5 - 5 1/2 weeks calculating by that. I don't understand how 4 days can make a 2 week gap??

But she done a transvaginal ultrasound and we didn't see anything but the tiniest black dot that she said "could be the start of the sac".

Has anyone else been through this?

Can anyone please show me their ultrasound around 5 weeks and let me compare??