Slight chance my (39M) pregnant wife (38F) had an affair, should I ask for a paternity test or wait?

My wife (38F) and I (39M) have been together for 12 years. I don’t know how to describe it other than calling it the perfect relationship. I think in 12 years we’ve only ever gotten to the point of really raising our voices at one another maybe 2 or 3 times? We do everything together but always have never had issues allowing each other to lead our own lives and follow our own interests. We bought a house where we wanted…. we both have good high paying jobs that have great work life balance. Basically it’s been everything short of perfect.

We’ve been trying for 2 years to get pregnant and it hadn’t been happening. We were just about to start the fertility stuff when I came home from a work trip, and guess what she’s pregnant. I had this weird instant thought of…. Wait I thought we didn’t try during the week last month because of the fertility testing… But I couldn’t remember exactly because to be honest… We were busy at it. So I just assumed I miss remembered.

Now, I travel around the country pretty regularly for work. Other than COVID, I’ve been on the road as much as 40 weeks a year sometimes. Since COVID its been less but still more than a week a month.