Can someone respond please. Like please.

I’m on birth control and I use conforms and recently I’m spotting on week two of my active pills. Like brown red blood. When it came time for my period this month I only had very light brown spotting. And that was for about 4 days on the fifth day that my period should have been there I took a pregnancy test and it was negative. I don’t think I’m pregnant because I always check for rips and always am safe but I’m confused and kinda scared.