I've been on the birth control pill for a year and haven't missed a day. Last month, I had unprotected sex a few days before my placebo week started. My 'period' that week was brown and weird (kind of normal for me). A month later, I had a tiny amount of pink discharge a week before my next placebo (period) week. I'm waiting anxiously for next week.. Is it possible I could be pregnant? I have no other symptoms.