I was supposed to start AF on the 14, I had light pink spotting the 4th and 5th, stopped the 6th then brown spotting the 7th and 8th. At no time did I need even a liner. Started getting symptoms like sore breasts, mild cravings and turn offs from certain foods, headaches, nausea and more. But even the blood tests are coming out neg. The nurse thought that spotting was my period but I'm thinking it was implantation bleeding. I've never been that light for a period. Any thoughts?