I have been using 2 different apps to track my period the past few months. One app told me I would start Oct 31st and the other app told me I would start Nov 5 and I still have yet to start. I have taken 2 first response pregnancy test. One was taken a few days before Oct 31st and the other was taken first thing in the morning of Nov 5th and both were negative. I've had some symptoms here and there that could go both ways being pregnant or just symptoms for pre period. I have random times when I've been nauseous, but I also had a head injury almost 2 weeks ago so I had a concussion, so I'm not sure if that could be why I am randomly getting nauseous. I had one day when one of my breast hurt to the touch which was about a week ago. But other than that nothing out of the norm. What do you guys think?