Is AF early?

Hi  all
Had a cracking headache all day which has made me feel sick. I feel so drained & in need of a good nights sleep. Havent slept properly for the past 2 nights!
Anyway Af isnt due till friday, just been to toilet and i have pink creamy discharge, no cramps no nothing i wouldnt even of known. And its only when i wipe. Google says implantation but i dont want to get my hopes up. Any thoughts? And thanks in advance!