I've been getting my periods every 2 weeks since March. I bleed for a week, have 2 weeks free and then bleed again for a week. I'm 21, not on birth control and haven't been in a long time. I have always been pretty regular, the only thing that has been different in my life lately was a miscarriage in December at 3 months. Does anyone else have such short cycles???? I'm a little worried because I've been trying to get pregnant again since February and nothing yet!