My cycle has always been 35 days dead on, usually 5 weeks to the day. I had never really tracked it or paid much attention to it until I downloaded an app (period diary) a couple years ago and noticed how precise it was each month. In December I contracted HSV-2 which was a horrible realization, but I've dealt with it mentally and I'm learning to live with the situation. My now boyfriend is entirely too supportive and understanding (I love this man).