
to the Fertility Charting board... I'm Nikki and I'm happy to try and help!
1. You will get crosshairs on your chart once you've had 3 consecutive high temps. Once you have O'd & had your thermal shift, it will be followed by continued high temps. Once you've had 3 consecutive highs, FF will put crosshairs on your chart for you.
2. Yes, you can O without getting a + OPK... happens all the time. OPK's can be tricky sometimes. If you take them at the wrong time you can totally miss your LH surge. I've had cycles where I did not get a + OPK, but I had a clear thermal shift letting me know that I had indeed O'd.
If you aren't already... I'd highly recommend checking your cm. That's really the best indicator of when you are entering your fertile phase.
I hope that helps and that we get to see more of you here and get to know you much better!!