Pink discharge/spotting

I am 3 dpo and i had some pinkish color discharge ... it start like discharge but its a bit like pink spotting when i wipe ... I've been having mild cramp since lastnight on and off which i thought was in my head at first until i started spotting this morning ..... i know its definitely not implantation bleeding ! So no need to say it i am just curios about what it could of been and if anyone ever experienced it and what was the outcome ?! Please and thanks in advance