Unprotected sex with pull out method has failure rate near about 15-28% as pre cum contains small amount sperm which may cause pregnancy
You did sex close to fertile days. So chance of being pregnant is quite high. Here, she needs to undergo one home pregnancy test and blood test
after 7 days to confirm.
Following test report, you can consult with gynecologist for next line management. Practice safe sex
in future. Good luck.