As there is clear discrepancy between your dates and the ultrasound
findings; moreover with an absence of the fetal heart and a collapsed yolk sac
, it is more likely that you have miscarried. Pregnancy
symptoms do persist for sometime even after a miscarriage
as the hCG levels take some time to come down. A repeat sonogram, preferably in the trans-vaginal route coupled with serial serum beta-hCG titres, can be conclusive. Hope your query is answered. Take care.