I understand you concern.
is a progesterone
it is given for endometriosis
. These kind of drugs are usually associated with irregularities in menses ie it may cause decreased bleeding to heavy bleeding.
Heaving bleeding usually associated with big clots, which you experienced as lining of womb.
Progesterone alone does not cause hot flashes or acne but it may cause hormonal
imbalance with in your body which causes this symptoms.
Theses symptoms will subside on regular use.
If it is heavy you need to consult your gync for advice