I started spotting very lightly and then it became medium spotting and stayed that way for 13 days. My boobs started to get sore towards the end of it all. And now i seem to have no appetite. I did have a miscarriage back in february and my body could be getting back to it's normal cycle but my boobs getting sore made me think i could be pregnant again. i get the occasional abdominal pain on my left side and slight headaches that teeter totter from the left to the right side of my head. Which happened when i first got pregnant. why else could i have spotted for 13 days?