Hi and thanks for the query,
I do not think there is anything to worry about. Presence of a gestational sac
, certainly with fetal heart tones at 6 weeks is enough to stay calm. This is too early to become worried if the fetal pole
is present or not. Returning for the control scan as indicated is very important.
I suggest you do not worry for there is certainly nothing apparently to be bothered about for now.
Wishing you a calm head and good health.
thanks and best regards,