hi, i was supposed to start my period yesterday and have had very light dark brown spotting only when i wipe, I m not filling a pad at all..... i normally am very heavy and bright red, its been going on for two days now and I have been extremely tired, nauseated, and kinda moody...I am on the pill and have not missed a pill. I have also had this strange metallic taste when I eat.....could I be pregant...I have taken two test and they have came out negative....so confused