Hi, I am on birth control and sexually active. I have taken the pill late sometimes. But recently I spotted a little, and one day two hours after the time I was supposed to take the pill, I began bleeding. The next day, in the morning, I very heavy, what looks like a blood clot came out after I d released my bladder. As I was wiping myself I noticed a piece of the clot on my tissue with what looked like white tissue developed onto it. Could I have been pregnant without knowing? Did I have a miscarriage?