Pinkish brown discharge after period normal?

Hi all! My period is super weird this month. My period usually lasts 5 days but this time it only lasted 3?? It seemed to stop right after my partner and i had sex two days ago. Since then, I’ve had pinkish brown discharge but no other weird symptoms. I am on birth control (extremely consistent) and my partner also pulls out so I doubt I’m pregnant, but is this normal??? The last time we had sex before that was the day before my period started. I’m 2 months away from my wedding and terrified of getting pregnant