Sprintec 28 day combo pill

I missed my last active pill in my 28 day Sprintec pack (it’s the combo pill), it was a complete accident. Had unprotected sex— should I be okay? I also took plan b just in case. Please spare me the comments of “you don’t need plan b” I just wanted to be responsible enough to take a back up method.

From what I’ve heard they expect u to miss a pill or two —- this is the first time ever since I’ve been on it for 6months that I have ever missed a dose. And it was the pill before my sugar pills.