Help me please

Ok. So I know this is possible but also some people say impossible. I'm currently on birth control (pill). I know you have to take it 7days same time to prevent pregnancy. When I wasn't on the pill just after my period, my husband but his dick in me a few times. Didn't cum or anything and pulled straight out after a few pushes. Is there a chance of pregnancy if he didn't cum? The next day I started the pill? Please help.xxx