Thanks for your query.
At 10 - 11 weeks, if there is no fetal pole
seen , then this is definitely a miscarriage
YOu should have a termination of pregnancy
( ideally by D and C ).
The material obtained should be sent for analysis.
Only the sac of pregnancy is seen with no developed fetus seen inside.
All the best and take care
Do not plan a pregnancy for the next 6 months.