I had the opposite. My wife and I sat in front of a lady hacking and blowing her nose on a 6 hour flight. A few days later my wife was sick and tested positive

I had the opposite. My wife and I sat in front of a lady hacking and blowing her nose on a 6 hour flight. A few days later my wife was sick and tested positive after 2 days. I was sick a day later, same symptoms, and never tested positive once after 3 tries. Possible we were sick at the same time with the same exposure with 2 different things? Maybe? But unlikely to me since we'd been on vacation together and to the same places for the last 10 days. Both of us were in the mild symptoms/cold symptoms range, so I also wonder if a home test just wasn't sensitive enough for me to test positive on for some reason.