Help!!!

So me and my boyfriend had sex the other week, long story short he ejaculated inside of me, but no worries I’m on birth control.

The birth control I’m on is Avianne. I started my placebo pills Sunday and today is Saturday. I’ve had light blood (pinkish) and brown discharge.

What could this mean?

P.S - I take my birth control pills regularly at 8:00 pm everyday. The latest I’ve been is 1-2 hours off.