my girlfriend is having an irregular period everytime, we had our last 2 intercourse right after her period ends and didnt follow it again, i used a condom on her and a withdrawal method at the same time i checked the condom by pouring out some water in it to check if it breaks, which is not... she should have her menstration last april 27 2013 but it didnt, up to this very day she is still delayed on her period, she told me she is ovulating last week,last saturday she's having a lower abdominal pain and then its gone on the next day..... is she pregnant?

 

thank you for asnwering