i had sex with my girlfriend on 22nd december 3 days after her period and she took postinor 2 the next morning less tham 24 hours later. on 1st she had stomach cramps and what she thought was her early periods which was lighter than normal and lasted a few days then stopped. she also complained of breast tenderness. is this normal, could she be prgnant. she was to expect her period by 15th of january.