II've never had a baby. When I was younger I did have a miscarriage. So my last period was the first week of december. I had sex multiple times around ovulation. My period never came which was due around the beginning of January. On January the 13th I started to bleed very very lightly. Only when I wiped. Today the 15th, I bled enough to put a pad on, only for an hour or so. Now I'm not at all.. other symptoms include heartburn, very light headed and dizzy, and food cravings. Also headaches and back pain. I've had two negative tests. Any ideas? Thanks..