possible Implantation bleeding?

Hi! My husband and I have been trying for a few months now. I was expecting to get my period next week, but on this past Monday evening (about a week before I expected to get my period, and about 10-12 days post ovulation) I had some light pink spotting. Tuesday and Weds I had on and off light spotting as well. Today I haven't had any spotting yet. Still monitoring... I have read just about every article online on implantation bleeding. Just looking for some opinions on if anyone had on and off bleeding for 2 days? Some sites say that's too long, and some say that's normal. I'm just not sure if my period came early and was just super short? Or if this may really have been implantation bleeding? Thanks for the help!