Just wanted to ask if anyone has experienced going from one cycle where they had lots of cm (around ovulation or not) and then had another (or the next) where there was hardly any cm?

I have been having symptoms of cramping and twinges in the lower abdominal area, light headaches on/off for the past couple of days, and boobs are feeling a little heavier. Don't know when I O'd but bd'd on CD's 11-17. I am on CD19 now and I don't believe I had much cm this cycle, even before bding, and last cycle I had more creamy cm and cewcm.