Ok, so, I started my periods as normal and except for a few years of dodgy teenage hormones I have been regular as clockwork every since. I was on the pill for c.10 years (not since 2010 though). The last four years have been predictable too - I know when I was ovulating, knew when I was coming on, knew when I was going to finish, knew what my glow would be like on any given day and now, suddenly, BAM AF has gone bonkers. We've been TTC for about sixth months and not one of those have followed any pattern. Cycles have been anything from 18-44 days. No obvious reason for change (eg. Stress, weight change). Out of desperation I bought myself some of those ovulation test strips from Amazon... And they showed me nothing, according to them I didn't ovulate - despite the fact that I'm still getting periods. Help, what's going on?