Hi Debadrita Ghosal, Welcome to HealthcareMagic Forum.
The active component in Femilon is Ethinylestradiol
which is a Derivative of Natural Estrogen Homone. Any Hormonal
Drug if taken for Prolonged period is harmful. Prolonged usage is known to cause Endometrial cancer
. If you don't want to conceive, you can ask your Husband to use a Condom and you can use Combined oral contraceptive Pills
. The bleeding had occurred due to withdrawal of Hormonal Effect. You wont have any Problem in conceiving if your Periods are regular. Kindly consult your Gynecologist before taking any Medicine.