First scan at 5W4D but only gestational sac :(

R

Just went for a transvaginal scan and a bit worried. Only gestational sac seen, no yolk sac or fetal pole.

I am measuring 9mm x 5mm x 8mm which is on track for my dates.

Has this happened to anyone else? Can you see anything else inside the ges sac? I can see something but not sure if my eyes are playing tricks on me!