My period this last month was quite odd, and not what I'm used to. It started out a bit later then I'm used to, and it was pretty heavy. Neither of these are normal for me. I always have spot on periods, that seem to never change. So this was just out of the "norm". Is it possibly that I could have been pregnant, and just miscarrying around the time my period was supposed to start? I have sex regularly, that is unprotected with my fiance, I'm on birth control pills, but I'm always taking them at different times, and some times almost forgetting altogether.

Is there even a small chance I could have been pregnant?

Also what are my chances of getting pregnant just using just the pill? and no other forms of birth control. We also have sex during my period, when I'm not exactly being protected by the pill. I'm also terrible about taking my pill at the same time every day, I take it whenever I remember. Does my chance of getting pregnant increase by a lot?

I would really love to here from someone ASAP! Thanks.