What Causes A Delayed Period With Stomach Cramps?

Okay, So I had protected sex about two weeks ago, i was a virgin before i did it.

The condom was sealed, no drips, no rips and he pulled out before he ejaculated.

my period was supposed to start yesterday but hasn't.

i pee alot and i have "cramps." (my hips and tummy hurt)

what's wrong with me?