I've been on the BC pill for about three years now, and I've been on the same brand for 2 years. It keeps me on a 28 day schedule with 3-4 days of withdrawal bleeding in the last half of my placebo week. I take it every day, but within a window between 10 PM and 2 AM because I don't always remember at 10. In fact I usually take it closer to midnight or later, depending. The latest I was this month was several days ago when I took it at 3 or 4 AM.
My last period started June 15. My boyfriend and I had sex on June 23. According to my period tracker app I was due to be "fertile" (if not for the pill) on June 24-30, with ovulation on June 29. My placebo week starts on Sunday July 10 so I would be expecting my withdrawal bleeding to start by July 13-14.
My question is that beginning last night and continuing into today, I have had a very slight spotting that is barely noticeable on a pantyliner and is most noticeable when I wipe. It's a light brownish pinkish color and very light, and looks a bit watery in consistency though it's hard to say. I've never experienced spotting like this on my pill before. I've also had a slight change in my areolas, slight tenderness in my breasts, and very light cramping today with a bit of a backache. Is it possible that this is implantation bleeding, 16 days after sex, or roughly 8 days post ovulation (if I ovulated)?