Has the red bus come yet? The only reason why I ask, is because my mom was about your age, thought she was becoming irregular due to hormonal changes until I finally went and bought a pregnancy test (the pharmacist looked very suspicious since I was in school uniform and probably looked about 14). I had to force her to take it - lo and behold, she was already 5 months pregnant. She then told me that she did have a blood test taken 3 months earlier - which came out negative. Holding thumbs on this side.