My gf last period started on 30 nov 2017, it lasted 4-5days. And after that we went overseas, her next period should start on the 30 dec but till now she still havent gotten her period yet. But she have brown discharge everyday. We did not have any unprotected sex after her last period but i did have some fingering but just the outside of the vagina. Is there any chance that she is pregnant or she is just late on her period because of travelling? And i ask her, she doesnt seems to have any pregnancy symptoms