Hi, I'm 16 years old and I am also a very active track runner in high school. I'm on jolivette birth control and have been on it for a couple months now. A couple months ago I got prescribed spironolactone for my acne and some antibiotics. I've been noticing irregular periods. For example, last month my period came a week late. This month I had some brown discharge around the time my period starts and I should be on it now but am not. I'm wondering if I should be worried that I'm pregnant or is it the medication messing with my periods?