Hi, I Am A First Timer Using Pills. I Gave

hi, i am a first timer using pills. i gave birth last january 2016 and my ob recommend me to use mercilon pills, i was in the province and theres no mercilon there so instead of mercilon i used marvelon which is according to pharmacist they are similar, i took it on the 2nd day of my mens, so i take 2 pills, and base on my observation my mens stop? is that normal for a first timer like me?