Hi am new to this so excuse me...! Been TTC for 4 months now. My cycle is pretty regular at 28 days and this month I am 2 days late so far ( due Wed 20 Feb) Usually the first day of AF is heavy and very painful. This week for a few days prior to AF due day I have felt minor cramps and just a bit off. Today I noticed some light brown discharge when I went to the bathroom and now am wondering what is going on! I likely ovulated around 6-7 Feb. I have done a couple of home tests and both negative. Nothing like this has happened toe before. Is it too late to be an implantation bleed?