I have been taking the pill for about 2 years and 3 months. I don't take breaks between packs. It's been about 3 months since my last period. And last year, I took the pill continuously without a single pause. Today, I saw some weird dark( it's not reddish. More dirty brownish) "spotting" (more like discharge/ tissue?) so far it's a small amount. Has my pill lost effect? I haven't missed a pill, I'm not on other medication. What is happening?