HI, Welcome to HCM, I am Dr. Das
First of all, as you have done pregnancy
test after the day of missed period, it is definite that she does not have pregnancy.
SO, what is the problem?
Unwanted 72. It caused hormonal
disbalance which doe not lead to period happening in the normal imnterval. It is the mot common side effect of these type of drug.
What you will do?
Tell your girl friend to wait for normal bleeding which will occur in some days.