welcome to HealthcareMagic
The use of progesterone
being a hormone is very widespread like from primary amenorrhoea;dysfunctional uterine bleeding
;postponement of menses;uterine hypoplasia
.In your case it is used to prepare the uterus and protect the pregnancy
so you should take as the doctor advised.Both tablets are necessary and should be taken and the time is not important but the convenient time is as advised and you should take the doses at the same time at least progesterone.