Is Morning Sickness Experienced In Case Of Early Delayed Miscarriage?

i was told i'm 12 weeks pregnant and so i went for my first scan on wednesday and was told i am having a early delayed miscarriage. but i dont believe i am, i am still having little flutters and still get morning sickness, i believe i could well be less than 12 weeks, i am not having any miscarriage symptoms and when i was at the hospital they said they wanted to wait a week to see if i have a miscarriage if not im to go back next week for an operation to remove the sac. the sac on the scan showed no faetus and no heartbeat that we could find. but if im less than 12 weeks that should eplain it and even the scan operator said i could be less than they believed i was.