For the past couple of weeks I have been nauseas 24/7, hot flashes, headaches, and bad lower back pain with mild abdominal tightening. I have had heavier discharge then normal. My period was suppose to start on July 25th, it did not start til July 31st late at night where it was brown, the next day seemed like a normal period but as the day went on it got lighter, the today it is barely flowing I could get away with one tampon or pad the whole day which is not normal for my period. Mind you I have been stressed lately this is still unusual for my body. I tested about 2-3 weeks ago and got a negative. I have one son and a positive did not show up with him til I was about 5/6 weeks along. Any suggestions on what could be going on?