Ladiessss, I have a question...

Okay, so let's say you had sex with a partner unprotected In December, he cums inside you. In January your period comes on time, but you also have sex with your other sex partner unprotected a day before your period.. days and days go by waiting for your February and it doesn't come... yall understanding what I'm saying... most likely need a DNA test right? 🙁
In December my period just had ended. I believe I wasn't ovulating at the moment.
(MY PERIOD IS NEVER LATE)