My period !?

I’m freaking out , my period was supposed to start two days ago, I’ve been sexually active lately but I’m on the pill and I’m really good about taking it each day and ketching up when I miss one, however I haven’t gotten my period yet, I’ve had bad stomachaches and have been feeling kind of pukey. I’m getting the regular signs that I do before my period like a breakout and cramps but also feeling kind of different and late on my period . Should I be freaking out ?