As long as the u/s looks ok, and the next one lines up, I would say you're near 7 weeks. Is it possible you haven't ovulated for several months? What did your doctor say?
With my first pregnancy, my body decided to go on vacation for a few months so I conceived in a cycle that was ultimately 80+ days long! We were tracking for ovulation (BBT) and had taken some occasional tests, so we were able to figure out when we conceived and had an ultrasound that confirmed our suspicion. Good luck!
My last period was oct. &im 22w3d ..
My period was in September and I'm 27 weeks u might wanna check again!!!!!!
I would think you would be farther than 7 weeks my last period was Feb and I'm 6 weeks