hi, my period has always been pretty normal. but the day i had imtercourse with my boyfriend a brown discharge came out and the next day i noticed light pink blood when i wipe and the next day there would not be any blood at all , THEN the next day i bled more , and i wore a pad because i thought this was my period but again , it went away but i am still noticing a light pink - light brown color when i wipe . could this just be my period? or pregnant?