This past week I have had some light spotting. I am on birth control pills, and I usually don't spot, so this was unusual. My period isn't supposed to start until next week. Today I noticed some tissue when I went to the restroom, it was very light brown in color. A couple hours before going to the restroom and noticing it, I think I could feel it passing through my vagina. I have been on the type of birth control that I am on right now for about a year, but have been on birth control pills for a little over two years.