is a progestin, it is mainly given for irregular bleeding, inferitlity, premenstrual syndrome
is a progesterone which is prescribed vaginally.
Progesterone is needed for the genital organ and prescribing vaginally is logically correct in maintaining local progesterone levels.
But no progesterone level in blood is actually monitored usually before prescribing progesterone containing drugs.
Any how they are prescribed for not wanting to take chance.
IF you definetely cant have Susten tablets you may have alternate progesterone tablets
You are also 11 days from ovulation, so it doesnt influence your further ovulation in next cycle since you are due for your menses