cycle 3, day 24

my handy ovulation monitor started telling me two days ago that i would get my period soon. i thought it was early, but i guess considering when i ovulated it makes sense. the first day it started flashing "m" i didn't feel like it was coming, other than some tiny cramps. but now i really feel like it could arrive at any moment. i was positive i would get it yesterday, and it still hasn't come today. i had a twinge of a headache yesterday, but not my usual pre-period pain. typically i don't feel this way for more than two days without it starting, so i guess by mid-week i could take a test if it doesn't. i'm not feeling incredibly optimistic about the possibility this month, but you never do know!