Received vvfl 9 and 10 DPO, with some negatives the last few day. Im now 15 DPO, period is late, im extremely nauseous all day, headaches off and on, lower back pain, light left side cramping since last weekend, sinus symptoms this past week and extremely tired more so than normal. I have a 6 month old, my period returned last month so I was expecting it to start again this month, but still nothing. I am on the pill but have been on antibiotics 2x and no super careful. At this point I know my period is coming any day, but slightly disappointed that I am getting negative tests as I was excited at the thought of another baby. 1st response was at 10 DPO and Blue dye is today at 15 DPO.