My Friend And Her Girlfriend Done A Protected Sex But

My friend and her girlfriend done a protected sex but due to dought she have taken unwanted 72. Her period should be on 9th February but till now it is missed. She have also tested with prega news and pathalogy Elisa test both are showing negative. She is feeling vomit , heavy breasts and temperature change in her body. She have also consumed regestrone-5mg 6 tb but period is still missing