Still Confused

Ok, I'm still confused. I had my ultrasound today. He saw a yolk sac and gestational sac but couldnt really see a baby or heartbeat. I'm supposed to go back in for another one in a week. He'll be looking for growth, and by that time he should be able to see a baby or heartbeat. He said it was possible that I ovulated later in my cycle and I'm not as far along as I thought. So... I don't know what to think. It's back at the waiting game for me. This sucks. I don't know how much more of this I can take!