If you are taking your pill the correct way and haven't skipped any then you should be fine. The change of being pregnant is slim to none.
None at all. There has to be semen inside of you in order to fertilize your egg. Also the pill works by making you not ovulate. Which means your eggs dont drop to be fertiziled therefore you do not have a fertile day. So even if he did come inside you your chances would be slim. Read up these things, especially if your taking the pill. Before putting thigs in your body know how they work, just sayin. Be safe have a good day :)