so about december 20th i got what i thought was my period.. it seemed a little earlier than usual and it was darker in color, didnt appear to be red at all and didnt really last as long as usual. now im experiencing lower back pain, nipple soreness, and a sort of white discharge. i took a HPT but it came back negative, but those seem like symptoms of pregnancy. i've never experienced any of these symptoms before but they seem to be all happening at once.. not too sure whats going on and it makes me a little nervous!