Period is a week late, 2 negative tests & brown dishcharge

I was feeling sick for three nights straight at night about a week before my period. Then three days in I felt like I had flu like symptoms. Body ache and dizziness. 
I have already taken two pregnancy tests and both came out negative. The tests I used were First Response Early Results. The first one I took two days before the first day of my period and took the second the day I was supposed to be on my period. I am now officially a week late and I just had a weird brown dishcharge sort of thing. It felt like a gush and when I went to the bathroom it was not dark but not super light. Am I pregnant.. ?