9 dpo ? implantation bleeding?!

Christina • Married my best friend 5/28/16 * pregnant with baby #1 due 3/24/18 *
So this month my husband and I decided to stop trying and just see what happens.  According to my estimates I'm 9dpo.  I had a small amount of brownish/pink bleeding this AM.  I have a 33 day cycle so this is really early for AF. I'm thinking this could be implantation. Fingers crossed!