Should I take a pregnancy test?

I don’t know if this is the right group to post this in but here it goes anyways...

So my period is almost a week late and it doesn’t feel like it’s gonna come. I had some very mild cramping around when I was supposed to get it but still nothing.

I’m on the bc pill and take it fairly regularly.

My bf and I had drunken unprotected sex, he pulled out but I know that’s not always effective.

The only symptoms I’m having are subtle spotting, headaches, and I have to pee a lot.

But I’m stressed out with trying to finish my undergrad so that could also cause the delayed/missed period and the headaches.

So should I wait and see if my period returns to normal on the next cycle? Or should I take a pregnancy test just for the sake of it?