hi, i just wanted to know what are the chances of my gf being pregnant

we had sex during her first and second day of the fertile window while USING CONDOMS. none of them broke, i checked up by filling them with water and nothing went out.

yesterday she was supposed to be on her period (last one started 08/08) but nothing yet.

last week she had all her pms symptoms and now they're "gone". she is not on pill and we are very carefully when using condoms, always check during and after the intercourse. i'm so nervous/anxious and she might be a little aswell. please helppp