I had sex with my girl friend on 9th Jan I didn't ejaculate inside her but as we didn't have safe sex she took ipill. Then after 4 days on 12th Jan 2018 she had a brown discharge and on 13th jan she had a dark brown bleeding from her vagina with less pain generally her cycles are 30 days she got her last period in 14th of december 2017. She is thinking if it is implantation bleeding. Is it true is she pregnant.