Sorry to hear that.
It really sucks doesn't it? You try, then wait, and wait and wait some more, all the while trying so hard to not get your hopes up...but you do anyway, because it is human nature and then Boom, you get your period and start all over again.
I really can't endorse tracking your basal body temperature and cervical mucous enough. It really puts you in more control of your fertility and lets you know when exactly you are ovulating, where as going by the usual day 14 of a period is actually not very accurate.
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