I was 5 weeks late before my mom asked me a bunch of questions and then finaly found out... I think it is about time that you tell her. Especially if you havent gone to the doc yet. I was sooo scared of my mom too, I think you are older than me, I am only 14 so I had the worst things going on in my head about what I thought my mom might have done to me. She always told me that if I had sex she would beat the heck out of me, so that made it even worse! But ofcourse she didnt... Your mom is probably suspecting that you are pregnant, so why wait, just tell her! Hope it all works out good! Good luck!!