Late? Or irregular?

So, my period is usually on time but every once in a while it will be irregular. And I’d only be late by a day or two.

I’ve always been told I was infertile but I haven’t gotten checked for that in years.

So far my period is late by 7 days. Which is a while even for my irregular periods .

My boyfriend did “finish” inside of me, but Like I said, I’ve always been told I was infertile.

What should I do?