So I had this faint positive on 1/6 I was having horrrrrrible lower back cramping and went to the ER ( my uterus is tilted to my back) they did a hcg blood test and said I had no hcg in my blood. It's been 5 days and still no af still have sore nipples on and off nausea and lower back cramping. Anybody experienced this too? Oh and I'm not sure when I ovulated because I have irregular cycles.