My girl fiend's mensturation cycle started 19th february. I met her last time on 26th of february and we did sex but I did not ejaculated inside her neither did I inserted. To date she has not went through mensturation and we are afraid if she is pregnant. We can't have child now. She also did a pregnancy test and it was negative. Infact she must have been on periods by 14th march and its already a week late. Will jjumping and drinking salty water help.