Could Bleeding With Lack Of PMS Mean Pregnancy?

i need advice iv had unprotected sex multiple times with my fiancee and have been having pregnancy symptoms two weeks prior to when my pms was due leg crammps lower abdominal bloatin dull headaches and backaches gas constipationfatigue salivia increase moodiness unusal eatin habits and just feeling pregnant but around the time my period was supposed to start i started bleeding but its not my normal flow with none of my pms symptoms i have during my period could i be pregnant and what is the bleeding caused from