Anyone can relate??

I have irregular periods and usually I start between the 1st or the latest is the 7th of the month, this month I "started" on the 2nd but it's not a period it's brown blood and it light enough to wear a thin panty liner. Two days of brown spitting so far. I've taken pregnancy tests if you look on my page you can see they are negative I've tried to see if someone can tweak them but as usual there is just views and not any help or comments.