Confused and scared

Patient: My now ex-boyfriend and I were making out and he put his penis near my vagina, I immediately told him to stop and and get off of me and put a condom on if he wanted to even get near me. Instead of getting off of me and putting one on, he leaned in to reach in his back pocket to get a condom, when he did his penis entered my vagina and I made him take it out. He put the condom on, but I am worried he may have gotten me pregnant when he leaned in. what should I do for this situation? And what chance do I have of being pregnant?