Hi there
If she did indeed begin her period 1-2 days after this incidence, there is no way she is pregnant. Now, if the timing is incorrect and the incidence occured and she did not have her period within 1-2 days, then we would need to discuss this further.
Bottom line..... if she was due for her period on (lets use October 15th for example) and you guys had unprotected sex on October 13th or October 14th and she started her period on October 15th....then no, no chance.
Nurse
17 years exp. in all areas of nursing including emergency medicine, hospital, and private practice.
You are welcome, take care!