I am 8 dpo and have been running a low grade temp off and on since Tuesday. Never goes above 99.4 but my usual temp is around 97.8/98 so it makes me feel icky. Tuesday and Wednesday was 99.4 and 99.1, then Thursday was fine, Friday and today has gone back to around 99.1-99.5.
This is my first cycle officially trying again after a 1.5 year break (previously treated by RE for unexplained IF). It's amazing that even after a break you jump back in to the obsessions. My period is due next Friday, 10/19.