I need help I’m confused. I use the Ovia app to track my cycles. Originally my fertile days were…

I need help I’m confused.

I use the Ovia app to track my cycles. Originally my fertile days were sept 30-oct 5. Well we did the deed on the 1st and my fiancé’s convinced I’m going to be pregnant. Today I went in the app to enter data and it said my fertile window changed to oct 3-8. I entered I had no cervical fluid today & it says that’s not right?? Am I just pregnant and I’m confusing the app or what lol. I’ve never had this issue before and of course it’s this month it happens. 🤦🏽‍♀️