scared i'm pregnant

so my boyfriend and i had sex four days go and the condom broke . nothing happened like he didn't cum and then the condom broke , but i was worried like precum or soemthing could've gotten inside so i took plan b like 48 hours later .

but the thing is we had sex the day before my period was supposed to start . and my period hasn't started yet ....

is it just the plan b that could be making my period late ? or do you think i could be pregnant ?

i still have uterine cramps , and all the norma things that happen before my period starts but i'm honestly so scared and he is too . i am just praying and praying that it's just my period that is late

my period is almost never late , so that's why i'm so terrified right now .