welcome to Health care magic.
1. Its not necessary to get D&C done always, in this time of
pregnancy even medical termination also can be tried. ( as it has less futures complications than medical termination)
2.Yes fetus have life ( heart beat from 5 weeks time )
3.There are multiple causes for this ,
hormonal / uterine pathologies, ovarian pathologies.
4.Please evaluate the cause, for future normal pregnancy.
5.suggest a good followup in the future pregnancies, good rest in first trimester period. ( less mobility )
Hope it helps you. Wish you a good health.
Anything to ask ? do not hesitate. Thank you.