"hi i am only 21 my pregnancy was a mistake but over the past few weeks i have gotten used to it and we have started really looking forward to it and started to get organised my 12 weeek scan was last week and i was told that they thought there was only an empty sac. and measured at 7.2 weeks i go back tomo to find out if i have a healthy baby or if i have had a missed miscarriage i have been waiti" . . . .