My period was due Feb 22 but didn't come until March 8 and it was lighter then usual, I had chlamydia so I imagine that was the cause. I was treated with azithromycin and doxycycline and then the health clinic said that was the wrong treatment and gave me an injection, flagyl and more doxycycline but I only took them for a week instead of two. Anyways I got retested and the test was negative. 3 days ago I started spotting pinkish blood and for the past two days I have been having brown spotting! The only other symptom I have is a headache which I have had for the past week. Can someone please tell me what could be causing this? I can't get it in to see my doc until April 11.