I take birth control religiously. I am sexually active. I haven't missed a pill in a long, long time. My period ended about 12 days ago, and at the beginning of this week (one week after my period) my breasts began to feel tender. I know this happens during my cycle, but usually not until closer to 1 week before my period begins, not two. I have felt some slight nausea on and off, but I suppose this could be related to anxiety. Last night I took a home pregnancy test which came out negative, but I wondered if I should trust it because it is probably too soon to know if I am pregnant. I would really like to know if I have reason to worry, or if I can trust the test. Also, if any of you get sensitive breasts on birth control, when does it happen for you? Thank you so much!