Colored discharge

Samantha
I'm new to all of this so I don't know slit of the aberrations lol my hubby and I have been trying to conceive since Sept didn't pay much attention to ovulation etc... Till this last month so I am 4 days before I should start my period and I'm having discharge almost like you would from a period just a darker almost brown color... Not sure if I'm just spotting or starting early but it's been going on for 3 days now... Any help would be appreciated