Should I be worried?

I’ll start off by mentioning that my periods are never steady, even at the age of 20. Sometimes they’ll be early and sometimes they can be late by a week or week and a half. But this one is really worrying me. My period is 2 weeks late, even though I’ve had the PMS symptoms before it was suppose to start. (I haven’t been on Birth control for about a year and a half.) My boyfriend and I have had sex a few times in the last two weeks with and once without protection, so should I take a pregnancy test just to be safe? Or has anyone else had this kind of issue before? As far as we know, the condom hasn’t had any tears or holes in it when we had sex. But I still don’t know why my period would be so late. And I haven’t had any noticeable pregnancy symptoms, but I also don’t really know if those type of symptoms take time to show up.

(I hope the post makes sense, it does to me, but I’m freaking out a little.)