My luteal phase is 10 days.
We conceived the first month we took a chance during my fertile time.
I have been charting for 5 years and wondered if I would have troubles too, but this time around I didn't.
I think LPD (Luteal phase defect) is for women whose LP is 9 days or less, so we're probably okay.
Just think, we don't really have quite a TWW, just a 10 day wait
I got my bfp one day prior to my AF being due to arrive, when I used a cheapy dipstick pregancy test. It was faint, but positive. Just to make sure I waited 7 days then repeated same test and got the good dark positive.
I think this is one of the most beneficial reasons to chart. A woman can see each phase of her cycle and can determine if there is a simple reason she's not conceiving. There's a lot of biological information contained in the cycle that saves a lot of testing and $$$ on fertility treatments.
Good luck!