Legitimately I need this question answered!

Okay so I don’t know if I’m weird but I have two apps that track my period, Glow and Cycles. So I had unprotected sex on the 12th of September. I’ve been feeling really off and moody along with some nausea and hip/lower back pain. it could also just be PMS, but I’m not sure.

Cycles says I’m two days late. BUT Glow says my period is not due for another 3 whole days. Everything is logged the same in both apps. I have triple checked. Should I be worried or should I just wait and see?????