Hello I Am An 18 Yr Old Male And My

Hello I am an 18 yr old male and my girlfriend is also the same age. We have sex a lot, she is on birth control in her arm and she also takes the pill everyday. I use condoms no matter what, and I pull out before I ejaculate just to be safe, and I check the condom everytime. Please tell me there is not even a chance she could be pregnant. She has been peeing a lot more than normal, and I think it’s because she drinks a lot of caffeine but I want to be sure.