The first day of my last period was 10/22. My periods are only 3 days long. I think glow assumes they are longer. It currently has me at 4+6 . It's technically been 38 days since the first day of my last period. I know it's not a huge difference or exact science but I'd like to get an appointment in before Christmas and I'm curious to see which date the doctor will gooff of. Thanks in advance!