I have been having dark/light brownish thick discharge since yesterday morning - not really heavy but only noticeable when I use the restroom and wipe. I had my period last week from Thursday-Sunday (March 6-9) and now I'm having this discharge a week later. I am sexually active with the same person for the last 3 1/2 years, but I am on birth control pills and have been for 4 years. The last time I was sexually active was last Saturday- the Saturday that I was on my period. I'm really concerned about what this discharge could be... any help would be greatly appreciated. Thanks!

Spotting?