I am heading toward the end of my fertile week and the day before yesterday I had a quarter sized amount of blood in my panties in the morning. It was a pinkish brown color. Is it possible that it could be implantation bleeding? I haven't had any bleeding since then and don't normally have spotting. I've also been feeling kind of weird for the passed two days. Maybe I'm just hoping to be pregnant and that's why I feel this way. Could I possibly be pregnant?