Here is my situation. I have been on yaz for the past year. I haven't had a period for about 2 months and 15 days. I have always taken my pills (have a cell phone alarm set so I always take them on time). I took a test 20 days ago and I was negative and took another test 3 weeks before that and it was negative. I have a history of thyroid problems and this has actually happened before where I didn't get a period for a few months a year ago. What could be going on? Am I pregnant? Something else? All my home tests have been negative. The last time I had sex was the end of September.