AF was supposed to come on the 12th and I started spotted yesterday (the 14th). I thought it was AF but it was just spotting, which is not normal for me. It made me think it could be implantation bleeding because I've also had super light cramping, which also isn't normal (normally super heavy period from the get go and painful cramps). It's very light pink and at times a little brown. The only thing that makes me wonder is that it comes and goes. This morning it was light and went away by the afternoon and now it's back, but a little heavier.