Me and my boyfriend have been together for a little over a year now. We were planning on having sex after I get on birth control next week but 2 days ago we were messing around and we got caught up in the moment and we had unprotected sex. He didn’t cum and there wasn’t any Pre cum because shortly after he put it in we decided to stop because it wasn’t a good idea. But I’m still paranoid of getting pregnant. What are the chances of getting pregnant off of that ? Please help