I have a 2.5 year old (conceived problem free with not much science involved!) and have now been TTC and temp charting for coming up to 5 months. My first 4 charts were identical : 29 day cycle with significant temp rise from around 97.4-6 to well over 98 on day 20. I think I therefore ovulate around day 19/20. I think this is quite late - should I be concerned? this cycle something weird has happened. I had my usual temp jump at day 20 then day 24and 25 had period cramps and light spotting. Day 26 my period has started full on. I find this really odd compared to the last 4 cycles. It also gives me a luteal phase of just 6 days this month?!