Pregnant maybe?

Hello Ladies.

So I hope and think I'm just freaking out. But I'm suppose to get my period this coming week, like Monday or Tuesday. I have two more days of birth control pills and then I'm suppose to start. Only thing is I don't have any period symptoms yet. Normally by now I get really tender boobs the week before my period, and so far nothing. We did have sex on the 7th of this month (august) and it was when I had just started the pill but due to a mix up I got my pills late and had to start them a couple days after my period ended. So I started pills on the 7th. So is it just in my head having no signs of my normal period coming? Or should I be worried?