I Am 2 Months 3 Week Pregnancy By Ivf My

I am 2 months 3 week pregnancy by ivf my first sonography find two fetus live on next sonography my doctor found one fetus have no heart beats this fetus stop growth in 6th week on third sonography every thing is ok with one fetus 11 weeks on last day I have some bleeding my doctor says to take gestone 100 injection every day & duphaston thrice a day now my bleeding you can say as a spotting stop in six hours after take medicine sir helps me to know that my baby is ok when I have to go for sonography or not is a another method to know my baby heart beats is ok plz help