Implantation bleeding??

So I was on my way out of the door this morning and felt a wet sensation and I was thinking to myself, "AF doesn't come til the 28th. What in the world?" So I went to check and it was really watery and pink tinged. Only being 8 DPO, how likely is it that it's implantation bleeding? I have a twinge of excitement but obviously don't want to get worked up yet. Thanks for your input in advance!