Period cramps without the period

Hey guys, is it normal to have period cramps before my period? I’m actually unsure of when my period is supposed to come, and I’ve had unprotected sex once in the past 2-3 weeks...

An obvious answer to a duh question would be “Yes ofc you have the high chance of becoming pregnant” but for anyone else that got an unplanned pregnancy, was this something that happened to you?