hhmmm i think i would be more inclined to go with the temps. simply because you can get ewcm even without ovulation, whereas a temp shift is more reliable in guaging whether an eggie has been released if that makes sense.

how long are your cycles normally? and how long is your usual luteal phase? i ask because like you i used to always have late ovulation (CD17-19) and had to work really hard to ensure that i was getting the multivitamins right for that time...found that it helped with EWCM...which is handy if, like me, you have a short-ish LP (mine was 10-12 days).

i hope i havent made this more confusing for you lol! i only just realised that it is a late O and wanted to double check to see if this is normal for you, or just a strange cycle IYKWIM.