I had unprotected sex the last day of my period and started bleeding a bit more during the sex. The next day I decided to take Plan B one step to be on the safe side and started getting a dark brown, almost metallic smelling discharge the same day. Now, the smell is becoming just a little less but the color of the discharge is now pink (still similar smell, but less pungent odor). Could this be from the Plan B pill or is there a possibility of pregnancy?