I was taking the sunday starters birth control and I stopped taking it around the middle of the cycle. After I did that, I bleed for about a week or two longer then at the end of my period I had protected sex with a boy. He told me that he pulled off the condom about half way through and we went for about ten mintutes without a condom, but he said that he didn't cum in me at all. I know there is a chance I could be pregnant since everytime you have sex there is, but how much of a chance is there for me to be pregnant?