Help plz


I calculated at been 5 weeks 4 days pregnant.

AF 11th june

Positive opk 25th june

Faint positive 6th july dark positive 9th july

Went for abdominal ultrasound today and can see gestational sac but no yolk sack ? should i be worried ...

Had no more pregnancy tests left but had 1 opk left so just took that and this is the result will it pick up hcg ?

Test line is alot darker than control line .

Im confused should i be seeing a yolk sack yet