i need help

because me and my boyfriend had sex before i left out of town and when he came i let him cum near my vagina and it ran down near the opening and when i was cleaning it off some could’ve got in my vagina and that was on the 28th and 30th and my last like two birth control pills i forgot to take on that day so i took them the day after and i didn’t like fully get my period it was like brown and clumpy ish and not a lot at all and i’m freaking out that i’m pregnant