Unclear Ultrasound

I was wondering if anyone had a similar issue they are experiencing now or before? I had previously went to the ER last Friday due to some minor spotting that turned out to be nothing. But when they pulled my blood it stated that I was 3-4 weeks and my ER note said 5 weeks. I went for my first prenatal appointment yesterday and they said I was 6 weeks and 6 days and they offered me an ultrasound because someone had cancelled and they could fit me in to accurately see how far along I am.

During the ultrasound, she stated she could clearly see the gestational sac, which had grown from my ER visit, but she could not see a yolk sac. When questioned, she couldn't give me a clear answer as to why. Not sure if it was just being complicated because she couldn't get a clear view of my right ovary either until she did an abdominal ultrasound. She stated it could because I am earlier then they expect and my ovulation day could have been off. They didn't pull any kind of lab work from me yesterday and I was left with more questions then answers.

This is my first pregnancy and I don't know how to feel. I'm nervous and scared that I may have miscarried but I don't want to think negatively. They scheduled me to come back in in 2 weeks for a repeat ultrasound to see if anything is visible. But how does one cope with another 2 weeks of uncertainty? Anyone have a similar situation to this? Thank you <3