implantation bleeding??

Jessica

Ladies... what does implantation bleeding look like?? this morning when i used the loo, i noticed brown discharge in my pants?? Looks like the first day of my period! Im not due on for another 16 day according to Glow! Could it be implantation bleeding?? Had sex a few days ago and I'm in my fertile window?? Really hoping so as been trying for a year now and I'm scared my cycles are becoming shorter!! Thanks ladies, baby dust to all xxx