good news ttc! i also have good news! had a follow up scan yeterday at my OB, 11w3d, and both babies look great, AND the small sac looks like it grew! it was my first visit with my OB, and she sees no reason at this point to be concerned at all! I am so happy! here are the pics, you can see if you compare to my 9w scans how much bigger the "small" sac looks (on the right)