Hlo Doctor I Had Sex With My Gf After 14

Hlo doctor i had sex with my gf after 14 days of last menstrual cycle..sperm ejaculation was nt dat much dense..she took contraceptive within 72 hours..her next cycle date was expected to 29 august..bt still its nt der..she is flng pain in his legs , thighs ,breast( continuously) and stomach ...wht is dis..is she pregnant or its just delay in cycle..?