My period last month started on December 7. We tried conceiving December 12, 13, 19, 20, 25, 27, and 31. I was extremely tired the next two days after the 20. More than I usually am. I was bloating through out the week, real tender breasts also. I felt a little nauseous a few mornings too and my appetite was up and down. On the 29, I had real light brown spotting, which I never have before my period. Then again on the 30. Only a few drops here and there. Then yesterday morning, I started my period. How could I have missed the chance to conceive? Is there a chance I'm still pregnant?