Hey everyone, I'm new here. I've been TTC for three months now. I had sex multiple times during my fertile window this past month. I even took an OT on 10/19 and it was positive. We had sex that day and two days after. Period is due tomorrow 11/3. I had light spotting ( barely there) on and off Tues-Friday. It was a dark brown color and only showed up a few times after wiping. It stopped Saturday morning. My breasts are killing me! But I don't think my nipples are darker. Could I have experienced implantation bleeding? When should I take a test If period is due tomorrow?