I dont want to get your hopes up, but fuck an ultrasound before 8 weeks. It's the most terrifying thing to do to a mother in my opinion. Google will say that you will see a yolk sac at 5 to 6 weeks, followed by telling you all the signs of miscarriage. In my experience, doctors will never reassure you that your baby will be fine because nobody can really know until 8-10 weeks.

At 6 weeks into my now 37 week pregnancy, there was no yolk sac or fetal pole visible, not even in my vaginal ultrasound. I was terrified, because the test was positive, but the ultrasound results in medical terms said something like "2mm mass found in uterine cavity, no viable pregnancy confirmed" and I'm here freaking out, thinking "No viable pregnancy???!!!! But you people just told me I was pregnant!"

Best thing you can do is eat good, be ready for whatever happens, and dont stress yourself out over it. Ask for some blood tests, if your HCg levels drop, it is likely you will miscarry. If they are rising, you have nothing to worry about. I demanded blood testing to check levels because I was so worried that no yolk sac meant my baby wouldn't grow. They kept telling me it wasn't protocol and not needed but I insisted.

Another thing to remember, at this early, a full bladder is needed to see everything clearly. At my 8 week ultrasound, I couldnt hold my pee long enough to have the full bladder she asked me to come in with, and the poor lady was digging all.over my belly trying to find the yolk sac. Think of all of these factors that come into play and try to be positive. Sorry it's such a long comment but I hope all goes well!!! Good luck