Had first appointment

Had my first appt at 5 wks 4 days. Because I am high risk my OB wants to see me early. Had an U/S and we have a healthy looking sac with a yolk sac! my OB could see a flicker at certain angles, but I couldn't see it. I am still in a fog, can't believe I am pregnant! I really hope that this little one is healthy. Our lives are totally gonna change! My other children are 13, 12, 10.