6w 5d but measuring 5w 2d - anyone else?

Jenna

According to my LMP, I should’ve been 6w 5d. We went for our first US on Friday, and measure 5w 2d. Sac and yolk located, but not fetal pole could be seen yet. We are going back in one week. I thought I had tracked all of our intercourse dates, but maybe I missed one? I find that hard to believe though, but I didn’t track we did or did NOT for that entire week, so it is possible. I’m really scared and anxious. Has anyone else had this happen? It’s so hard to wait another week. I just want to know what’s going on!! Please say a prayer for us to accept God’s plan for our family, whatever it may be.