Hi rnagbe, welcome to HCM,
You have mentioned here about taking Duphaston
twice daily but failed to mention since when you were taking or took duphaston.
Since you have two previous miscarriages you have been prescribed Duphaston in this pregnancy
to maintain this pregnancy as Duphaston is a synthetic hormone similar to the hormone progesterone
which is required in sufficient quantities for maintaining pregnancy in its early stages.Eventhough if taken in high doses has adverse reactions both for the pregnancy and fetus(baby), it is completely safe if taken in right doses and constant supervision of an Obstetrician.
Wishing for your good health, Dr. Parthipan