idk if i could get pregnant

so me and my boyfriend just had sex like 20 to 30 min ago and i was on top, he was protected by the way. anyways i was on top and we had just finished and i was laying on top of him and when i started coming up his cum started falling out of the condom and im afraid it got on my vagina but idkk . After i got scared, i right away washed myself with water and wiped myself down. My period is next week, is there a possibility i could be pregnant or am i just stressing?