Is Progesterone pills successful?


I’m 5+3 I asked my doctor to put me on progesterone pills since I’ve had 2 previous chemical pregnancies in September and October of 2019 .. she prescribed 200mg 1 pill at night .. has anybody ever took the pill and has it been successful? I’ve stressed myself out so bad over this baby sticking in there with me I’ve already loss 6lbs bc I’ve been so worried I haven’t even been eating , my appetite has been none existent for 2 straight weeks