Can Douloton Be Taken Instead Of Novelon For Irregular Periods?

Hi, I Am Aruna and my age is 29 years, i have two kids and i am having irregular periods and my doctor advised me to take Novelon 21 tablets in this cycle to regulate the periods. But the side effects have been given as Breast cancer and Obesity, it is mentioned in the tablet leaflet itself.Is it true shall i take this tablet or not.I am totally confused.I am already overweight.please guide me and solve my problem.Can i replace the tablet with douloton tablet.Thank You.