Is Missed Periods After Stopped Intake Of Birth Control Pills Concerning?

hi, i am really worried about my period. i have to take medication for a spider bite and it stops the birth control from working so i decided to stop taking the pills and hopefully get my period. i havnt taken the pills for a week now and the only sign of a period is that i had really bad cramps for a little while. i dont think im due for my period yet because it is in the middle of my pill sheet but should still get it any way?