Thank you for your query.
Firstly, I need to know your LMP and exact weeks of pregnancy
WIth a non viable sac in the uterus
and a cyst
in the ovary, a doubt of ectopic pregnancy is raised.
However, with perfectly doubling HCG
levels, that possibility is ruled out.
It is possible it is an intra uterine pregnancy that is very early or taking time to attain viability.
Only repeat transvaginal scans and BHCG serially can show if this is the case.
Meanwhile take adequate rest and have regular follow ups.
please provide further details and reports plus any ultrasound
scans if any for me to comment better.