When will Aunt Flo come to visit?

I really don't have much of an idea!

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Originally, on this cycle #4, I wasn't going to use any OPKs. Shortly after AF ended last time, I thought I had some signals of ovulation. So I did do a few OPK tests this month. And I think(hope!) I ovulated around CD9 or 10. The test line got the darkest I've ever seen it on CD9 and then went back to a faint line the next day. However, it was not equal to or darker than the control line. I have seen several women reporting online that their tests don't get that dark either. I have my fingers crossed that I actually did ovulate this cycle. I think that would be the first time since my miscarriage in July.

I'm not sure how long my luteal phase is though. Which means AF could really come anytime between tomorrow and Christmas Day. My last 3 cycles were 27, 32 and 21 days long. TTC is such a waiting game isn't it?