Anyone?

Jess
So.. Today I was using the bathroom and brown discharge came out about 2 hours later it turned to bright red with someone brown clotting .. I have cramping and a headache. I am 6 Dpo.. And my period wasn't due till the 21st which is a week away.. Is it possible that AF just decided to come early ?? There is nothing on my underwear .. Or pad just when I wipe.. So could it be AF OR something else??