Is It Safe To Have Deviry For Missed Period Despite Having Positive UPT?

I am 31 yrs old, with 2 children cyserian.my period start on 18th of every month but after 10 days period missed. So I consulted my doctor, she advised me to take deviry 10 mg twice a day for 5 days.doc.also says pregnancy test is positive. Will my periods will start.