Hii There I Need Ur Help Regarding Pregnancy.. Around 7-8

hii there
i need ur help regarding pregnancy.. around 7-8 months ago i had undergone through myomactomy and D&C. After that i have regular periods.. But from last 2 months i had observed some abnormality in periods.. nd this month I have delayed my periods about 7 days. My Dr advised me to take "duphaston" as in I am not recovered fully internally.. nd this medicine will start my periods soon.. is that happens or not? if not then plz suggest something to have natural abortion