Period Or Pregnancy?

Me and my gf have an unprotected sex last January 30 and in feb 3, 4 days after she experience cramping and whiteeblood discharge and on feb 7 she got a very bad cramping and now feb 9 she have an whiteblood discharge is this a sign of pregnancy or period is coming? Actually i think i withdraw it but im not 100% sure. The expected date of my gf's period is feb 1 but its usual to her to have a delayed period.