I got my Depo shot September 24, 2014. My most recent period occurred November 14 and lasted until November 27. My boyfriend and I had unprotected sex December 3 three times. He came in me. That night, my throat became itchy and I developed a cough. The next day my ribs chest and stomach began to hurt and feel tight whenever I would cough. I had a little bit of spotting that day and then it stopped. Today, i noticed blood in my underwear when I went to use the bathroom. I am not due for my next shot until December 24. My stomach chest and ribs are still tight when i cough. The doctors at my mothers job sugggest that I have bronchitis but I'm not sure. Why am i bleeding? Could I just be sick and not be showing signs of pregnancy? Could I be pregnant?