I have charted my bbt off and on for over a decade. I have always run high 96's pre-O and low 97's post-O. My cycles have been fairly regular 28-32 days with a few odd exceptions (both longer and shorter). I am now in my early 40's and was wondering if there is anything else besides pregnancy that could cause my period to be almost 2 weeks late and my temp to be in the low-mid 98's? (started taking my temp this cycle at around cd36)
FWIW, dh and I are not trying to get pregnant, but other than attempting to avoid sex between cd9 and cd18ish we are not using any form of birth control.