Helppppp

Hey y’all. So I got off birth control in like October and my last period was like the beginning November.

I had sex on December 21 (he stuck it in without a condom first then out one on) and I was supposed to get my period the week after but didn’t. I took tests and it was negative.

But my period is late again ( it was supposed to come on Friday). Do y’all think it’s still my hormones

trying to get back right or maybe stress or change in my diet??