So I recently started birth control (Sprintec 28) I had went to the hospital for a blood clot that was about the size of my palm and i got some pretty bad news about it but anyways ever since I updated my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> app to say I started birth control (Sep 11, 2016 it was on a Sunday) my green days are gone 

and also my next period is in 18 days which I don't understand because my next pack would be on a Saturday so on Sunday do I take a blue pill or a white pill? I'm so lost please help