The description you have left leads me to believe either:
You have taken a pregnancy test an believe u have consieved yet you still had a bleed during the seven day break... This would not necessarily mean that you aren't pregnant, as it is a forced bleed due to the hormones in the pills and is not the same as a period. Even off the pill, after getting pregnant many women may hav a period early on.
Or
You have missed a bleed and believe you are therefore pregnant... This may not be true either as the pills seven day break do not promise a bleed although the lack of hormone for a week promotes it. Many women in fact miss bleeds whilst this week.
The best thing u can do to get the constant baby thoughts out of your mind i hate to say is to either take a pregnancy test (my recommendation is 'First Response') or to go to your GP and get checked out. Niether it must be said can be too daunting.
Hope you get the answer you want.