I have been on an oral contraceptive for over a year, and am pretty regular with it. I missed a whole month about 3 months ago, but started up again, after I got my period. I got my normal period for the last 2 months and it seems to be regular. The last one, I had my normal period (3 days) and one week later, I noticed brown, watery looking blood in my undies. I am very much sexually active and have been (we do it as much as we can, at least once a day). We had intercourse and the next day (it was one week after the end of my last period). I noticed the blood. Could I be pregnant? The day before bleeding, I missed a pill and didn't take it until the following night. So, I was bleeding before I took both to get caught up. I take my pill around 10pm every night, give or take a few hours. Please let me know if it's breakthrough bleeding (even though I have had it before and it doesn't look like this), or if it is implantation bleeding.