However, she hasn't displayed any tell-tale signs of pregnancy
(morning sickness, sore breasts, spotting, cravings, etc.)
We never had sex without a condom after she was off birth control, and I made sure I removed the condom and checked it for breakage. While she was on birth control and we had unprotected sex, I would never finish inside of her.
As far as I know, there's no way she could be pregnant.