5wks fet pregnant fet started bleeding, u/s small sac but blood levels r great. progesterone is low. what's d cause of d sac being small ? can the hcg show complication yet. bleeding ystdy. hcg today

Pregnancy bleeding : Bleeding in pregnancy is never normal but s very common. At 5 weeks one expects to see a small sac but it is too early to see a fetus. Bleeding increases the risk of miscarriage. A low Progesterone has some correlation to nonviable pregnancies. In these cases you simply have to wait. Time will tell. Best of luck to you.

Concerning: Maybe a miscarriage--only time will tell. Sounds like they are doing everything to keep a close eye on you.