Tan discharge

I’ve been taking bc pills since early September and this past week I have had tan discharge. No foul odor, pains, etc. My bf never ejaculates inside me cause we are both super cautious. Saturday and Sunday, I took my pill about 1-2 hours late because I was skiing those days. Overall, I’ve NEVER missed a pill or taken it later than 3 hours. I am 16 days away from my next period. What could this mean?