Im late

Madison
I'm scared because i'm 17! i've had unprotected sex but he pulled out before anything happened... i don't know if i'm late or not because i haven't been tracking my period... but it's almost the end of the month and i haven't had it yet. i've been stressing so bad over it. i need help on what to do. i've had back pain, headaches, acne, and some
cramps... what do i do