Blurblur>> If I were you, I will get the CB one to test. Like I said before, my gynae only recommends that brand for home testing.
If it turns out that you're not preggies, then perhaps you should make an appointment to see your gynae to check why your AF has MIA.
After I delivered my #1, my menses took 2 months to resume (before that no menses at all cos I was breastfeeding). Before AF resumed, I actually went to see my gynae and she scanned and saw that there was a corpus luteum there (basically its what's left of the follicle after the egg is released). She could even estimate that within 2-3 wks, I will get my first post natal AF. And she was right!
So if you're not preggie, your gynae should be able to explain what's happening. She can even give you medication to jump start your system, so that your AF comes and you can have a new TTC cycle again. If not, keep on waiting for AF to appear is also not the solution.