help me! late! coffee!

Ajeng
so i was supposed to get my period on around 15-17th of september, but i haven't got mine until today, and i BARELY late.... i never have sex so im not supposed to get pregnant right?._. but i think my diet isn't that great, i had 1-2 cups of coffee almost everyday during this month, lol... so, what is going on with me? can coffee be the problem? thanksss!!!