How likely is it to O on cd 18 if my past charts, i didnt o until cd 46 and cd 42? i know i have very irregular cycles...like 2 to 3 month long cycles. i have been taking evening primrose oil since the begining of this cycle to help with my cycle induced migraines and i wondered if that has anything to do with my o date or if it just has an effect on cm. I'm just curious cuz my temp took a dive this morning and has been going steadily downward for the past few days and i want to know if it is even possible. thanks for any input

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