I have a 7 week ultrasound scheduled and I can't stop thinking about it. At 7 weeks what should be / usually is visible? If nothing is visible does that mean no chance or could what should be there at 7 weeks appear at 8 weeks or later? The Doctor mentioned doing a measurement to get a better estimate on a due date at this appointment but Im pretty much certain of when I ovulated and probably even implanted. I am curious as to what it is hes measuring. Honestly I am a bit scared I will go in and things that are supposed to be happening in there wont be and the docs won't wait it out a bit to see if it appears later. I know total paranoia at this point. Thank you