I was ovulating the week of the 3rd and had unprotected sex most of the days especially the ones where my chances were higher. I was supposed to get my period the 23rd and I am never late. Today would have made 5 days late however I started bleeding. It is a light red to brownish color. At first it was very little now I am bleeding enough to be on a pad. We have been trying to conceive the past 2 months now and I'm worried that maybe I might be having a miscarriage. But I read that it might be implantation bleeding. Can someone please inform me on what might be happening. I do have some cramps but nowhere near the amount of pain as menstrual cramps. It's just a light pain. And I've been feeling nauseous all day..