Any Ideas?

Hey Ladies I would like some advice if any of you have some. So I started my period the 9th of july. I was suppose to start the 5th I was 5 days late. Now I "got off" it the 11th. And now I'm only having that brown dead blood only when I whipe. Now my periods are normally heavy. And this one Wasn't was very light n SHORT. I don't know what it is. I also took a pregnancy test the 7th and it came back negative. I gained 6 pounds in just four days the weekend of the 4th of July ( not from food). And my urin is having a very strong smell to it , and uti test are negative. When I was pregnant in 2013 I had symptoms of strong urine and weight gain and had my period for 3 months while pregnant. But then I miscarriaged. Anyways should I test again? What do you ladies think about it all?

P.s TTC sense February 2014.