Worried

I feel really stupid asking this question, but I just want to know how you guys would feel. I am on birth control and I didn't miss a pill, I had sex on the last day of my period this month but I was on the active pills. We didn't use a condom though we usually always do, but I just thought since I hadn't missed any pills it would be okay. He hadn't ejaculated in a few days which is another reason why we didn't use a condom, because I was sure there wouldn't be any sperm in his precum. Also, he didn't ejactulate in me, he pulled out well before he ejaculated and promised that nothing got in me. Would any of you be nervous of pregnancy?