Confused and need opinions!

Okay so this is my 3rd cycle since getting merina out... I was supposed to start Friday, and didn't and still haven't... Pregnancy test today said BFN. I understand some may say it's bc of the birth control but my dr said since it's a "local" periods should resume after getting it out... Am I testing too soon? About 10 days past ovulation. So frustrated bc we are trying for baby #2!