My normal cycle is around 32 days ovulation around day 20.
This month I had a temp spike of around 0.4 at day 12 which sustained until day 15 (today). However I had no fertile CM, and my boobs are not sore at all and they usually are after ovulation.
The only thing I can think is I got a new (really cosy!) duvet the day before my temp 'spike' could this raise my temp 0.4 deg? Is that possible?